diff --git a/GoCardless/GoCardless.csproj b/GoCardless/GoCardless.csproj
index 45eaa32..3a4ca6c 100644
--- a/GoCardless/GoCardless.csproj
+++ b/GoCardless/GoCardless.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <PackageId>GoCardless</PackageId>
-    <PackageVersion>4.4.0</PackageVersion>
+    <PackageVersion>4.5.0</PackageVersion>
     <Authors>GoCardless Ltd</Authors>
     <Description>Client for the GoCardless API - a powerful, simple solution for the collection of recurring bank-to-bank payments</Description>
     <PackageRequireLicenseAcceptance>false</PackageRequireLicenseAcceptance>
@@ -11,7 +11,7 @@
     <Copyright>GoCardless Ltd</Copyright>
     <PackageTags>gocardless payments rest api direct debit</PackageTags>
     <PackageLicenseUrl>https://github.com/gocardless/gocardless-dotnet/blob/master/LICENSE.txt</PackageLicenseUrl>
-    <PackageReleaseNotes>https://github.com/gocardless/gocardless-dotnet/releases/tag/v4.4.0</PackageReleaseNotes>
+    <PackageReleaseNotes>https://github.com/gocardless/gocardless-dotnet/releases/tag/v4.5.0</PackageReleaseNotes>
     <TargetFrameworks>netstandard1.6;netstandard2.0;net46</TargetFrameworks>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
diff --git a/GoCardless/GoCardlessClient.Generated.cs b/GoCardless/GoCardlessClient.Generated.cs
index cef7e0d..f3233eb 100644
--- a/GoCardless/GoCardlessClient.Generated.cs
+++ b/GoCardless/GoCardlessClient.Generated.cs
@@ -73,6 +73,11 @@ public partial class GoCardlessClient
         /// </summary>
         public MandatePdfService MandatePdfs => new MandatePdfService(this);
 
+        /// <summary>
+        ///A service for working with payer authorisation resources.
+        /// </summary>
+        public PayerAuthorisationService PayerAuthorisations => new PayerAuthorisationService(this);
+
         /// <summary>
         ///A service for working with payment resources.
         /// </summary>
diff --git a/GoCardless/GoCardlessClient.cs b/GoCardless/GoCardlessClient.cs
index ee0a514..8dc2a14 100644
--- a/GoCardless/GoCardlessClient.cs
+++ b/GoCardless/GoCardlessClient.cs
@@ -252,9 +252,9 @@ private HttpRequestMessage BuildHttpRequestMessage<T>(string method, string path
             var httpMethod = new HttpMethod(method);
 
             var requestMessage = new HttpRequestMessage(httpMethod, new Uri(_baseUrl, path));
-            requestMessage.Headers.Add("User-Agent", "gocardless-dotnet/4.4.0");
+            requestMessage.Headers.Add("User-Agent", "gocardless-dotnet/4.5.0");
             requestMessage.Headers.Add("GoCardless-Version", "2015-07-06");
-            requestMessage.Headers.Add("GoCardless-Client-Version", "4.4.0");
+            requestMessage.Headers.Add("GoCardless-Client-Version", "4.5.0");
             requestMessage.Headers.Add("GoCardless-Client-Library", "gocardless-dotnet");
             requestMessage.Headers.Authorization =
                 new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", _accessToken);
diff --git a/GoCardless/Resources/Event.cs b/GoCardless/Resources/Event.cs
index 8d8ca5b..ab45c4a 100644
--- a/GoCardless/Resources/Event.cs
+++ b/GoCardless/Resources/Event.cs
@@ -376,7 +376,7 @@ public class EventLinks
         public string ParentEvent { get; set; }
 
         /// <summary>
-        /// ID of a Payer Authorisation.
+        /// ID of a [payer authorisation](#core-endpoints-payer-authorisations).
         /// </summary>
         [JsonProperty("payer_authorisation")]
         public string PayerAuthorisation { get; set; }
diff --git a/GoCardless/Resources/PayerAuthorisation.cs b/GoCardless/Resources/PayerAuthorisation.cs
new file mode 100644
index 0000000..534617e
--- /dev/null
+++ b/GoCardless/Resources/PayerAuthorisation.cs
@@ -0,0 +1,506 @@
+using System;
+using System.Collections.Generic;
+using System.Runtime.Serialization;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+
+namespace GoCardless.Resources
+{
+
+    /// <summary>
+    /// Represents a payer authorisation resource.
+    ///
+    /// Payer Authorisation resource acts as a wrapper for creating customer,
+    /// bank account and mandate details in a single request.
+    /// PayerAuthorisation API enables the integrators to build their own custom
+    /// payment pages.
+    /// 
+    /// The process to use the Payer Authorisation API is as follows:
+    /// 
+    ///   1. Create a Payer Authorisation, either empty or with already
+    /// available information
+    ///   2. Update the authorisation with additional information or fix any
+    /// mistakes
+    ///   3. Submit the authorisation, after the payer has reviewed their
+    /// information
+    ///   4. [coming soon] Redirect the payer to the verification mechanisms
+    /// from the response of the Submit request (this will be introduced as a
+    /// non-breaking change)
+    ///   5. Confirm the authorisation to indicate that the resources can be
+    /// created
+    /// 
+    /// After the Payer Authorisation is confirmed, resources will eventually be
+    /// created as it's an asynchronous process.
+    /// 
+    /// To retrieve the status and ID of the linked resources you can do one of
+    /// the following:
+    /// <ol>
+    ///   <li> Listen to <code>  payer_authorisation_completed </code>  <a
+    /// href="#appendix-webhooks"> webhook</a> (recommended)</li>
+    ///   <li> Poll the GET <a
+    /// href="#payer-authorisations-get-a-single-payer-authorisation">
+    /// endpoint</a></li>
+    ///   <li> Poll the GET events API
+    /// <code>https://api.gocardless.com/events?payer_authorisation={id}&action=completed</code>
+    /// </li>
+    /// </ol>
+    /// 
+    /// <p class="notice">
+    ///   Note that the `create` and `update` endpoints behave differently than
+    ///   other existing `create` and `update` endpoints. The Payer
+    /// Authorisation is still saved if incomplete data is provided.
+    ///   We return the list of incomplete data in the `incomplete_fields` along
+    /// with the resources in the body of the response.
+    ///   <br><br>
+    ///   The API is designed to be flexible and allows you to collect
+    /// information in multiple steps without storing any sensitive data in the
+    /// browser or in your servers.
+    /// </p>
+    /// </summary>
+    public class PayerAuthorisation
+    {
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Customer Bank Account](#core-endpoints-customer-bank-accounts).
+        /// </summary>
+        [JsonProperty("bank_account")]
+        public PayerAuthorisationBankAccount BankAccount { get; set; }
+
+        /// <summary>
+        /// [Timestamp](#api-usage-time-zones--dates), recording when this Payer
+        /// Authorisation was created.
+        /// </summary>
+        [JsonProperty("created_at")]
+        public DateTimeOffset? CreatedAt { get; set; }
+
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Customer](#core-endpoints-customers).
+        /// </summary>
+        [JsonProperty("customer")]
+        public PayerAuthorisationCustomer Customer { get; set; }
+
+        /// <summary>
+        /// Unique identifier, beginning with "PA".
+        /// </summary>
+        [JsonProperty("id")]
+        public string Id { get; set; }
+
+        /// <summary>
+        /// An array of fields which are missing and is required to set up the
+        /// mandate.
+        /// </summary>
+        [JsonProperty("incomplete_fields")]
+        public List<PayerAuthorisationIncompleteField> IncompleteFields { get; set; }
+
+        /// <summary>
+        /// Resources linked to this PayerAuthorisation.
+        /// </summary>
+        [JsonProperty("links")]
+        public PayerAuthorisationLinks Links { get; set; }
+
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Mandate](#core-endpoints-mandates).
+        /// </summary>
+        [JsonProperty("mandate")]
+        public PayerAuthorisationMandate Mandate { get; set; }
+
+        /// <summary>
+        /// One of:
+        /// - `created`: The PayerAuthorisation has been created, and not been
+        /// confirmed yet
+        /// - `submitted`: The payer information has been submitted
+        /// - `confirmed`: PayerAuthorisation is confirmed and resources are
+        /// ready to be created
+        /// - `completed`: The PayerAuthorisation has been completed and
+        /// customer, bank_account and mandate has been created
+        /// - `failed`: The PayerAuthorisation has failed and customer,
+        /// bank_account and mandate is not created
+        /// </summary>
+        [JsonProperty("status")]
+        public PayerAuthorisationStatus? Status { get; set; }
+    }
+    
+    /// <summary>
+    /// Represents a payer authorisation bank account resource.
+    ///
+    /// All details required for the creation of a
+    /// [Customer Bank Account](#core-endpoints-customer-bank-accounts).
+    /// </summary>
+    public class PayerAuthorisationBankAccount
+    {
+        /// <summary>
+        /// Name of the account holder, as known by the bank. Usually this is
+        /// the same as the name stored with the linked
+        /// [creditor](#core-endpoints-creditors). This field will be
+        /// transliterated, upcased and truncated to 18 characters. This field
+        /// is required unless the request includes a [customer bank account
+        /// token](#javascript-flow-customer-bank-account-tokens).
+        /// </summary>
+        [JsonProperty("account_holder_name")]
+        public string AccountHolderName { get; set; }
+
+        /// <summary>
+        /// Bank account number - see [local
+        /// details](#appendix-local-bank-details) for more information.
+        /// Alternatively you can provide an `iban`.
+        /// </summary>
+        [JsonProperty("account_number")]
+        public string AccountNumber { get; set; }
+
+        /// <summary>
+        /// Account number suffix (only for bank accounts denominated in NZD) -
+        /// see [local details](#local-bank-details-new-zealand) for more
+        /// information.
+        /// </summary>
+        [JsonProperty("account_number_suffix")]
+        public string AccountNumberSuffix { get; set; }
+
+        /// <summary>
+        /// Bank account type. Required for USD-denominated bank accounts. Must
+        /// not be provided for bank accounts in other currencies. See [local
+        /// details](#local-bank-details-united-states) for more information.
+        /// </summary>
+        [JsonProperty("account_type")]
+        public PayerAuthorisationBankAccountAccountType? AccountType { get; set; }
+
+        /// <summary>
+        /// Bank code - see [local details](#appendix-local-bank-details) for
+        /// more information. Alternatively you can provide an `iban`.
+        /// </summary>
+        [JsonProperty("bank_code")]
+        public string BankCode { get; set; }
+
+        /// <summary>
+        /// Branch code - see [local details](#appendix-local-bank-details) for
+        /// more information. Alternatively you can provide an `iban`.
+        /// </summary>
+        [JsonProperty("branch_code")]
+        public string BranchCode { get; set; }
+
+        /// <summary>
+        /// [ISO 3166-1 alpha-2
+        /// code](http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements).
+        /// Defaults to the country code of the `iban` if supplied, otherwise is
+        /// required.
+        /// </summary>
+        [JsonProperty("country_code")]
+        public string CountryCode { get; set; }
+
+        /// <summary>
+        /// [ISO 4217](http://en.wikipedia.org/wiki/ISO_4217#Active_codes)
+        /// currency code. Currently "AUD", "CAD", "DKK", "EUR", "GBP", "NZD",
+        /// "SEK" and "USD" are supported.
+        /// </summary>
+        [JsonProperty("currency")]
+        public string Currency { get; set; }
+
+        /// <summary>
+        /// International Bank Account Number. Alternatively you can provide
+        /// [local details](#appendix-local-bank-details). IBANs are not
+        /// accepted for Swedish bank accounts denominated in SEK - you must
+        /// supply [local details](#local-bank-details-sweden).
+        /// </summary>
+        [JsonProperty("iban")]
+        public string Iban { get; set; }
+
+        /// <summary>
+        /// Key-value store of custom data. Up to 3 keys are permitted, with key
+        /// names up to 50 characters and values up to 500 characters.
+        /// </summary>
+        [JsonProperty("metadata")]
+        public IDictionary<string, string> Metadata { get; set; }
+    }
+    
+    /// <summary>
+    /// Bank account type. Required for USD-denominated bank accounts. Must not be provided for bank
+    /// accounts in other currencies. See [local details](#local-bank-details-united-states) for
+    /// more information.
+    /// </summary>
+    [JsonConverter(typeof(StringEnumConverter))]
+    public enum PayerAuthorisationBankAccountAccountType {
+
+        /// <summary>`account_type` with a value of "savings"</summary>
+        [EnumMember(Value = "savings")]
+        Savings,
+        /// <summary>`account_type` with a value of "checking"</summary>
+        [EnumMember(Value = "checking")]
+        Checking,
+    }
+
+    /// <summary>
+    /// Represents a payer authorisation customer resource.
+    ///
+    /// All details required for the creation of a
+    /// [Customer](#core-endpoints-customers).
+    /// </summary>
+    public class PayerAuthorisationCustomer
+    {
+        /// <summary>
+        /// The first line of the customer's address.
+        /// </summary>
+        [JsonProperty("address_line1")]
+        public string AddressLine1 { get; set; }
+
+        /// <summary>
+        /// The second line of the customer's address.
+        /// </summary>
+        [JsonProperty("address_line2")]
+        public string AddressLine2 { get; set; }
+
+        /// <summary>
+        /// The third line of the customer's address.
+        /// </summary>
+        [JsonProperty("address_line3")]
+        public string AddressLine3 { get; set; }
+
+        /// <summary>
+        /// The city of the customer's address.
+        /// </summary>
+        [JsonProperty("city")]
+        public string City { get; set; }
+
+        /// <summary>
+        /// Customer's company name. Required unless a `given_name` and
+        /// `family_name` are provided. For Canadian customers, the use of a
+        /// `company_name` value will mean that any mandate created from this
+        /// customer will be considered to be a "Business PAD" (otherwise, any
+        /// mandate will be considered to be a "Personal PAD").
+        /// </summary>
+        [JsonProperty("company_name")]
+        public string CompanyName { get; set; }
+
+        /// <summary>
+        /// [ISO 3166-1 alpha-2
+        /// code.](http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements)
+        /// </summary>
+        [JsonProperty("country_code")]
+        public string CountryCode { get; set; }
+
+        /// <summary>
+        /// For Danish customers only. The civic/company number (CPR or CVR) of
+        /// the customer. Must be supplied if the customer's bank account is
+        /// denominated in Danish krone (DKK).
+        /// </summary>
+        [JsonProperty("danish_identity_number")]
+        public string DanishIdentityNumber { get; set; }
+
+        /// <summary>
+        /// Customer's email address. Required in most cases, as this allows
+        /// GoCardless to send notifications to this customer.
+        /// </summary>
+        [JsonProperty("email")]
+        public string Email { get; set; }
+
+        /// <summary>
+        /// Customer's surname. Required unless a `company_name` is provided.
+        /// </summary>
+        [JsonProperty("family_name")]
+        public string FamilyName { get; set; }
+
+        /// <summary>
+        /// Customer's first name. Required unless a `company_name` is provided.
+        /// </summary>
+        [JsonProperty("given_name")]
+        public string GivenName { get; set; }
+
+        /// <summary>
+        /// An [IETF Language Tag](https://tools.ietf.org/html/rfc5646), used
+        /// for both language
+        /// and regional variations of our product.
+        /// 
+        /// </summary>
+        [JsonProperty("locale")]
+        public string Locale { get; set; }
+
+        /// <summary>
+        /// Key-value store of custom data. Up to 3 keys are permitted, with key
+        /// names up to 50 characters and values up to 500 characters.
+        /// </summary>
+        [JsonProperty("metadata")]
+        public IDictionary<string, string> Metadata { get; set; }
+
+        /// <summary>
+        /// The customer's postal code.
+        /// </summary>
+        [JsonProperty("postal_code")]
+        public string PostalCode { get; set; }
+
+        /// <summary>
+        /// The customer's address region, county or department. For US
+        /// customers a 2 letter
+        /// [ISO3166-2:US](https://en.wikipedia.org/wiki/ISO_3166-2:US) state
+        /// code is required (e.g. `CA` for California).
+        /// </summary>
+        [JsonProperty("region")]
+        public string Region { get; set; }
+
+        /// <summary>
+        /// For Swedish customers only. The civic/company number (personnummer,
+        /// samordningsnummer, or organisationsnummer) of the customer. Must be
+        /// supplied if the customer's bank account is denominated in Swedish
+        /// krona (SEK). This field cannot be changed once it has been set.
+        /// </summary>
+        [JsonProperty("swedish_identity_number")]
+        public string SwedishIdentityNumber { get; set; }
+    }
+    
+    /// <summary>
+    /// An array of fields which are missing and is required to set up the
+    /// mandate.
+    /// </summary>
+    public class PayerAuthorisationIncompleteField
+    {
+        /// <summary>
+        /// The root resource.
+        /// </summary>
+        [JsonProperty("field")]
+        public string Field { get; set; }
+
+        /// <summary>
+        /// A localised error message
+        /// </summary>
+        [JsonProperty("message")]
+        public string Message { get; set; }
+
+        /// <summary>
+        /// The path to the field e.g. "/payer_authorisations/customer/city"
+        /// </summary>
+        [JsonProperty("request_pointer")]
+        public string RequestPointer { get; set; }
+    }
+    
+    /// <summary>
+    /// Represents a payer authorisation link resource.
+    ///
+    /// IDs of the created resources. Available after the Payer Authorisation is
+    /// completed.
+    /// </summary>
+    public class PayerAuthorisationLinks
+    {
+        /// <summary>
+        /// Unique identifier, beginning with "BA".
+        /// </summary>
+        [JsonProperty("bank_account")]
+        public string BankAccount { get; set; }
+
+        /// <summary>
+        /// Unique identifier, beginning with "CU".
+        /// </summary>
+        [JsonProperty("customer")]
+        public string Customer { get; set; }
+
+        /// <summary>
+        /// Unique identifier, beginning with "MD". Note that this prefix may
+        /// not apply to mandates created before 2016.
+        /// </summary>
+        [JsonProperty("mandate")]
+        public string Mandate { get; set; }
+    }
+    
+    /// <summary>
+    /// Represents a payer authorisation mandate resource.
+    ///
+    /// All details required for the creation of a
+    /// [Mandate](#core-endpoints-mandates).
+    /// </summary>
+    public class PayerAuthorisationMandate
+    {
+        /// <summary>
+        /// Key-value store of custom data. Up to 3 keys are permitted, with key
+        /// names up to 50 characters and values up to 500 characters.
+        /// </summary>
+        [JsonProperty("metadata")]
+        public IDictionary<string, string> Metadata { get; set; }
+
+        /// <summary>
+        /// For ACH customers only. Required for ACH customers. A string
+        /// containing the IP address of the payer to whom the mandate belongs
+        /// (i.e. as a result of their completion of a mandate setup flow in
+        /// their browser).
+        /// </summary>
+        [JsonProperty("payer_ip_address")]
+        public string PayerIpAddress { get; set; }
+
+        /// <summary>
+        /// Unique reference. Different schemes have different length and
+        /// [character set](#appendix-character-sets) requirements. GoCardless
+        /// will generate a unique reference satisfying the different scheme
+        /// requirements if this field is left blank.
+        /// </summary>
+        [JsonProperty("reference")]
+        public string Reference { get; set; }
+
+        /// <summary>
+        /// A Direct Debit scheme. Currently "ach", "autogiro", "bacs", "becs",
+        /// "becs_nz", "betalingsservice", "pad" and "sepa_core" are supported.
+        /// </summary>
+        [JsonProperty("scheme")]
+        public PayerAuthorisationMandateScheme? Scheme { get; set; }
+    }
+    
+    /// <summary>
+    /// A Direct Debit scheme. Currently "ach", "autogiro", "bacs", "becs", "becs_nz",
+    /// "betalingsservice", "pad" and "sepa_core" are supported.
+    /// </summary>
+    [JsonConverter(typeof(StringEnumConverter))]
+    public enum PayerAuthorisationMandateScheme {
+
+        /// <summary>`scheme` with a value of "ach"</summary>
+        [EnumMember(Value = "ach")]
+        Ach,
+        /// <summary>`scheme` with a value of "autogiro"</summary>
+        [EnumMember(Value = "autogiro")]
+        Autogiro,
+        /// <summary>`scheme` with a value of "bacs"</summary>
+        [EnumMember(Value = "bacs")]
+        Bacs,
+        /// <summary>`scheme` with a value of "becs"</summary>
+        [EnumMember(Value = "becs")]
+        Becs,
+        /// <summary>`scheme` with a value of "becs_nz"</summary>
+        [EnumMember(Value = "becs_nz")]
+        BecsNz,
+        /// <summary>`scheme` with a value of "betalingsservice"</summary>
+        [EnumMember(Value = "betalingsservice")]
+        Betalingsservice,
+        /// <summary>`scheme` with a value of "pad"</summary>
+        [EnumMember(Value = "pad")]
+        Pad,
+        /// <summary>`scheme` with a value of "sepa_core"</summary>
+        [EnumMember(Value = "sepa_core")]
+        SepaCore,
+    }
+
+    /// <summary>
+    /// One of:
+    /// - `created`: The PayerAuthorisation has been created, and not been confirmed yet
+    /// - `submitted`: The payer information has been submitted
+    /// - `confirmed`: PayerAuthorisation is confirmed and resources are ready to be created
+    /// - `completed`: The PayerAuthorisation has been completed and customer, bank_account and
+    /// mandate has been created
+    /// - `failed`: The PayerAuthorisation has failed and customer, bank_account and mandate is not
+    /// created
+    /// </summary>
+    [JsonConverter(typeof(StringEnumConverter))]
+    public enum PayerAuthorisationStatus {
+
+        /// <summary>`status` with a value of "created"</summary>
+        [EnumMember(Value = "created")]
+        Created,
+        /// <summary>`status` with a value of "submitted"</summary>
+        [EnumMember(Value = "submitted")]
+        Submitted,
+        /// <summary>`status` with a value of "confirmed"</summary>
+        [EnumMember(Value = "confirmed")]
+        Confirmed,
+        /// <summary>`status` with a value of "completed"</summary>
+        [EnumMember(Value = "completed")]
+        Completed,
+        /// <summary>`status` with a value of "failed"</summary>
+        [EnumMember(Value = "failed")]
+        Failed,
+    }
+
+}
diff --git a/GoCardless/Services/EventService.cs b/GoCardless/Services/EventService.cs
index 3b0baba..3a7a377 100644
--- a/GoCardless/Services/EventService.cs
+++ b/GoCardless/Services/EventService.cs
@@ -255,7 +255,7 @@ public enum EventInclude
         public string ParentEvent { get; set; }
 
         /// <summary>
-        /// ID of a Payer Authorisation.
+        /// ID of a [payer authorisation](#core-endpoints-payer-authorisations).
         /// </summary>
         [JsonProperty("payer_authorisation")]
         public string PayerAuthorisation { get; set; }
diff --git a/GoCardless/Services/PayerAuthorisationService.cs b/GoCardless/Services/PayerAuthorisationService.cs
new file mode 100644
index 0000000..4878f87
--- /dev/null
+++ b/GoCardless/Services/PayerAuthorisationService.cs
@@ -0,0 +1,933 @@
+
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Runtime.Serialization;
+using System.Threading;
+using System.Threading.Tasks;
+using GoCardless.Internals;
+using GoCardless.Resources;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+
+namespace GoCardless.Services
+{
+    /// <summary>
+    /// Service class for working with payer authorisation resources.
+    ///
+    /// Payer Authorisation resource acts as a wrapper for creating customer,
+    /// bank account and mandate details in a single request.
+    /// PayerAuthorisation API enables the integrators to build their own custom
+    /// payment pages.
+    /// 
+    /// The process to use the Payer Authorisation API is as follows:
+    /// 
+    ///   1. Create a Payer Authorisation, either empty or with already
+    /// available information
+    ///   2. Update the authorisation with additional information or fix any
+    /// mistakes
+    ///   3. Submit the authorisation, after the payer has reviewed their
+    /// information
+    ///   4. [coming soon] Redirect the payer to the verification mechanisms
+    /// from the response of the Submit request (this will be introduced as a
+    /// non-breaking change)
+    ///   5. Confirm the authorisation to indicate that the resources can be
+    /// created
+    /// 
+    /// After the Payer Authorisation is confirmed, resources will eventually be
+    /// created as it's an asynchronous process.
+    /// 
+    /// To retrieve the status and ID of the linked resources you can do one of
+    /// the following:
+    /// <ol>
+    ///   <li> Listen to <code>  payer_authorisation_completed </code>  <a
+    /// href="#appendix-webhooks"> webhook</a> (recommended)</li>
+    ///   <li> Poll the GET <a
+    /// href="#payer-authorisations-get-a-single-payer-authorisation">
+    /// endpoint</a></li>
+    ///   <li> Poll the GET events API
+    /// <code>https://api.gocardless.com/events?payer_authorisation={id}&action=completed</code>
+    /// </li>
+    /// </ol>
+    /// 
+    /// <p class="notice">
+    ///   Note that the `create` and `update` endpoints behave differently than
+    ///   other existing `create` and `update` endpoints. The Payer
+    /// Authorisation is still saved if incomplete data is provided.
+    ///   We return the list of incomplete data in the `incomplete_fields` along
+    /// with the resources in the body of the response.
+    ///   <br><br>
+    ///   The API is designed to be flexible and allows you to collect
+    /// information in multiple steps without storing any sensitive data in the
+    /// browser or in your servers.
+    /// </p>
+    /// </summary>
+
+    public class PayerAuthorisationService
+    {
+        private readonly GoCardlessClient _goCardlessClient;
+
+        /// <summary>
+        /// Constructor. Users of this library should not call this. An instance of this
+        /// class can be accessed through an initialised GoCardlessClient.
+        /// </summary>
+        public PayerAuthorisationService(GoCardlessClient goCardlessClient)
+        {
+            _goCardlessClient = goCardlessClient;
+        }
+
+        /// <summary>
+        /// Retrieves the details of a single existing Payer Authorisation. It
+        /// can be used for polling the status of a Payer Authorisation.
+        /// </summary>
+        /// <param name="identity">Unique identifier, beginning with "PA".</param>
+        /// <param name="request">An optional `PayerAuthorisationGetRequest` representing the query parameters for this get request.</param>
+        /// <param name="customiseRequestMessage">An optional `RequestSettings` allowing you to configure the request</param>
+        /// <returns>A single payer authorisation resource</returns>
+        public Task<PayerAuthorisationResponse> GetAsync(string identity, PayerAuthorisationGetRequest request = null, RequestSettings customiseRequestMessage = null)
+        {
+            request = request ?? new PayerAuthorisationGetRequest();
+            if (identity == null) throw new ArgumentException(nameof(identity));
+
+            var urlParams = new List<KeyValuePair<string, object>>
+            {
+                new KeyValuePair<string, object>("identity", identity),
+            };
+
+            return _goCardlessClient.ExecuteAsync<PayerAuthorisationResponse>("GET", "/payer_authorisations/:identity", urlParams, request, null, null, customiseRequestMessage);
+        }
+
+        /// <summary>
+        /// Creates a Payer Authorisation. The resource is saved to the database
+        /// even if incomplete. An empty array of incomplete_fields means that
+        /// the resource is valid. The ID of the resource is used for the other
+        /// actions. This endpoint has been designed this way so you do not need
+        /// to save any payer data on your servers or the browser while still
+        /// being able to implement a progressive solution, such as a multi-step
+        /// form.
+        /// </summary>
+        /// <param name="request">An optional `PayerAuthorisationCreateRequest` representing the body for this create request.</param>
+        /// <param name="customiseRequestMessage">An optional `RequestSettings` allowing you to configure the request</param>
+        /// <returns>A single payer authorisation resource</returns>
+        public Task<PayerAuthorisationResponse> CreateAsync(PayerAuthorisationCreateRequest request = null, RequestSettings customiseRequestMessage = null)
+        {
+            request = request ?? new PayerAuthorisationCreateRequest();
+
+            var urlParams = new List<KeyValuePair<string, object>>
+            {};
+
+            return _goCardlessClient.ExecuteAsync<PayerAuthorisationResponse>("POST", "/payer_authorisations", urlParams, request, id => GetAsync(id, null, customiseRequestMessage), "payer_authorisations", customiseRequestMessage);
+        }
+
+        /// <summary>
+        /// Updates a Payer Authorisation. Updates the Payer Authorisation with
+        /// the request data.Can be invoked as many times as needed. Only fields
+        /// present in the request will be modified. An empty array of
+        /// incomplete_fields means that the resource is valid. This endpoint
+        /// has been designed this way so you do not need to save any payer data
+        /// on your servers or the browser while still being able to implement a
+        /// progressive solution, such a multi-step form. <p class="notice">
+        /// Note that in order to update the `metadata` attribute values it must
+        /// be sent completely as it overrides the previously existing values.
+        /// </p>
+        /// </summary>
+        /// <param name="identity">Unique identifier, beginning with "PA".</param>
+        /// <param name="request">An optional `PayerAuthorisationUpdateRequest` representing the body for this update request.</param>
+        /// <param name="customiseRequestMessage">An optional `RequestSettings` allowing you to configure the request</param>
+        /// <returns>A single payer authorisation resource</returns>
+        public Task<PayerAuthorisationResponse> UpdateAsync(string identity, PayerAuthorisationUpdateRequest request = null, RequestSettings customiseRequestMessage = null)
+        {
+            request = request ?? new PayerAuthorisationUpdateRequest();
+            if (identity == null) throw new ArgumentException(nameof(identity));
+
+            var urlParams = new List<KeyValuePair<string, object>>
+            {
+                new KeyValuePair<string, object>("identity", identity),
+            };
+
+            return _goCardlessClient.ExecuteAsync<PayerAuthorisationResponse>("PUT", "/payer_authorisations/:identity", urlParams, request, null, "payer_authorisations", customiseRequestMessage);
+        }
+
+        /// <summary>
+        /// Submits all the data previously pushed to this PayerAuthorisation
+        /// for verification.This time, a 200 HTTP status is returned if the
+        /// resource is valid and a 422 error response in case of validation
+        /// errors. After it is successfully submitted, the Payer Authorisation
+        /// can no longer be edited.
+        /// </summary>
+        /// <param name="identity">Unique identifier, beginning with "PA".</param>
+        /// <param name="request">An optional `PayerAuthorisationSubmitRequest` representing the body for this submit request.</param>
+        /// <param name="customiseRequestMessage">An optional `RequestSettings` allowing you to configure the request</param>
+        /// <returns>A single payer authorisation resource</returns>
+        public Task<PayerAuthorisationResponse> SubmitAsync(string identity, PayerAuthorisationSubmitRequest request = null, RequestSettings customiseRequestMessage = null)
+        {
+            request = request ?? new PayerAuthorisationSubmitRequest();
+            if (identity == null) throw new ArgumentException(nameof(identity));
+
+            var urlParams = new List<KeyValuePair<string, object>>
+            {
+                new KeyValuePair<string, object>("identity", identity),
+            };
+
+            return _goCardlessClient.ExecuteAsync<PayerAuthorisationResponse>("POST", "/payer_authorisations/:identity/actions/submit", urlParams, request, null, "data", customiseRequestMessage);
+        }
+
+        /// <summary>
+        /// Confirms the Payer Authorisation, indicating that the resources are
+        /// ready to be created.
+        /// A Payer Authorisation cannot be confirmed if it hasn't been
+        /// submitted yet.
+        /// 
+        /// <p class="notice">
+        ///   The main use of the confirm endpoint is to enable integrators to
+        /// acknowledge the end of the setup process. 
+        ///   They might want to make the payers go through some other steps
+        /// after they go through our flow or make them go through the necessary
+        /// verification mechanism(upcomming feature). 
+        /// </p>
+        /// </summary>
+        /// <param name="identity">Unique identifier, beginning with "PA".</param>
+        /// <param name="request">An optional `PayerAuthorisationConfirmRequest` representing the body for this confirm request.</param>
+        /// <param name="customiseRequestMessage">An optional `RequestSettings` allowing you to configure the request</param>
+        /// <returns>A single payer authorisation resource</returns>
+        public Task<PayerAuthorisationResponse> ConfirmAsync(string identity, PayerAuthorisationConfirmRequest request = null, RequestSettings customiseRequestMessage = null)
+        {
+            request = request ?? new PayerAuthorisationConfirmRequest();
+            if (identity == null) throw new ArgumentException(nameof(identity));
+
+            var urlParams = new List<KeyValuePair<string, object>>
+            {
+                new KeyValuePair<string, object>("identity", identity),
+            };
+
+            return _goCardlessClient.ExecuteAsync<PayerAuthorisationResponse>("POST", "/payer_authorisations/:identity/actions/confirm", urlParams, request, null, "data", customiseRequestMessage);
+        }
+    }
+
+        
+    /// <summary>
+    /// Retrieves the details of a single existing Payer Authorisation. It can
+    /// be used for polling the status of a Payer Authorisation.
+    /// </summary>
+    public class PayerAuthorisationGetRequest
+    {
+    }
+
+        
+    /// <summary>
+    /// Creates a Payer Authorisation. The resource is saved to the database
+    /// even if incomplete. An empty array of incomplete_fields means that the
+    /// resource is valid. The ID of the resource is used for the other actions.
+    /// This endpoint has been designed this way so you do not need to save any
+    /// payer data on your servers or the browser while still being able to
+    /// implement a progressive solution, such as a multi-step form.
+    /// </summary>
+    public class PayerAuthorisationCreateRequest : IHasIdempotencyKey
+    {
+
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Customer Bank Account](#core-endpoints-customer-bank-accounts).
+        /// </summary>
+        [JsonProperty("bank_account")]
+        public PayerAuthorisationBankAccount BankAccount { get; set; }
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Customer Bank Account](#core-endpoints-customer-bank-accounts).
+        /// </summary>
+        public class PayerAuthorisationBankAccount
+        {
+
+            /// <summary>
+            /// Name of the account holder, as known by the bank. Usually this
+            /// is the same as the name stored with the linked
+            /// [creditor](#core-endpoints-creditors). This field will be
+            /// transliterated, upcased and truncated to 18 characters. This
+            /// field is required unless the request includes a [customer bank
+            /// account token](#javascript-flow-customer-bank-account-tokens).
+            /// </summary>
+            [JsonProperty("account_holder_name")]
+            public string AccountHolderName { get; set; }
+
+            /// <summary>
+            /// Bank account number - see [local
+            /// details](#appendix-local-bank-details) for more information.
+            /// Alternatively you can provide an `iban`.
+            /// </summary>
+            [JsonProperty("account_number")]
+            public string AccountNumber { get; set; }
+
+            /// <summary>
+            /// Account number suffix (only for bank accounts denominated in
+            /// NZD) - see [local details](#local-bank-details-new-zealand) for
+            /// more information.
+            /// </summary>
+            [JsonProperty("account_number_suffix")]
+            public string AccountNumberSuffix { get; set; }
+
+            /// <summary>
+            /// Bank account type. Required for USD-denominated bank accounts.
+            /// Must not be provided for bank accounts in other currencies. See
+            /// [local details](#local-bank-details-united-states) for more
+            /// information.
+            /// </summary>
+            [JsonProperty("account_type")]
+            public PayerAuthorisationAccountType? AccountType { get; set; }
+        /// <summary>
+        /// Bank account type. Required for USD-denominated bank accounts. Must
+        /// not be provided for bank accounts in other currencies. See [local
+        /// details](#local-bank-details-united-states) for more information.
+        /// </summary>
+        [JsonConverter(typeof(StringEnumConverter))]
+        public enum PayerAuthorisationAccountType
+        {
+    
+            /// <summary>`account_type` with a value of "savings"</summary>
+            [EnumMember(Value = "savings")]
+            Savings,
+            /// <summary>`account_type` with a value of "checking"</summary>
+            [EnumMember(Value = "checking")]
+            Checking,
+        }
+
+            /// <summary>
+            /// Bank code - see [local details](#appendix-local-bank-details)
+            /// for more information. Alternatively you can provide an `iban`.
+            /// </summary>
+            [JsonProperty("bank_code")]
+            public string BankCode { get; set; }
+
+            /// <summary>
+            /// Branch code - see [local details](#appendix-local-bank-details)
+            /// for more information. Alternatively you can provide an `iban`.
+            /// </summary>
+            [JsonProperty("branch_code")]
+            public string BranchCode { get; set; }
+
+            /// <summary>
+            /// [ISO 3166-1 alpha-2
+            /// code](http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements).
+            /// Defaults to the country code of the `iban` if supplied,
+            /// otherwise is required.
+            /// </summary>
+            [JsonProperty("country_code")]
+            public string CountryCode { get; set; }
+
+            /// <summary>
+            /// [ISO 4217](http://en.wikipedia.org/wiki/ISO_4217#Active_codes)
+            /// currency code. Currently "AUD", "CAD", "DKK", "EUR", "GBP",
+            /// "NZD", "SEK" and "USD" are supported.
+            /// </summary>
+            [JsonProperty("currency")]
+            public string Currency { get; set; }
+
+            /// <summary>
+            /// International Bank Account Number. Alternatively you can provide
+            /// [local details](#appendix-local-bank-details). IBANs are not
+            /// accepted for Swedish bank accounts denominated in SEK - you must
+            /// supply [local details](#local-bank-details-sweden).
+            /// </summary>
+            [JsonProperty("iban")]
+            public string Iban { get; set; }
+
+            /// <summary>
+            /// Key-value store of custom data. Up to 3 keys are permitted, with
+            /// key names up to 50 characters and values up to 500 characters.
+            /// </summary>
+            [JsonProperty("metadata")]
+            public IDictionary<String, String> Metadata { get; set; }
+        }
+
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Customer](#core-endpoints-customers).
+        /// </summary>
+        [JsonProperty("customer")]
+        public PayerAuthorisationCustomer Customer { get; set; }
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Customer](#core-endpoints-customers).
+        /// </summary>
+        public class PayerAuthorisationCustomer
+        {
+
+            /// <summary>
+            /// The first line of the customer's address.
+            /// </summary>
+            [JsonProperty("address_line1")]
+            public string AddressLine1 { get; set; }
+
+            /// <summary>
+            /// The second line of the customer's address.
+            /// </summary>
+            [JsonProperty("address_line2")]
+            public string AddressLine2 { get; set; }
+
+            /// <summary>
+            /// The third line of the customer's address.
+            /// </summary>
+            [JsonProperty("address_line3")]
+            public string AddressLine3 { get; set; }
+
+            /// <summary>
+            /// The city of the customer's address.
+            /// </summary>
+            [JsonProperty("city")]
+            public string City { get; set; }
+
+            /// <summary>
+            /// Customer's company name. Required unless a `given_name` and
+            /// `family_name` are provided. For Canadian customers, the use of a
+            /// `company_name` value will mean that any mandate created from
+            /// this customer will be considered to be a "Business PAD"
+            /// (otherwise, any mandate will be considered to be a "Personal
+            /// PAD").
+            /// </summary>
+            [JsonProperty("company_name")]
+            public string CompanyName { get; set; }
+
+            /// <summary>
+            /// [ISO 3166-1 alpha-2
+            /// code.](http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements)
+            /// </summary>
+            [JsonProperty("country_code")]
+            public string CountryCode { get; set; }
+
+            /// <summary>
+            /// For Danish customers only. The civic/company number (CPR or CVR)
+            /// of the customer. Must be supplied if the customer's bank account
+            /// is denominated in Danish krone (DKK).
+            /// </summary>
+            [JsonProperty("danish_identity_number")]
+            public string DanishIdentityNumber { get; set; }
+
+            /// <summary>
+            /// Customer's email address. Required in most cases, as this allows
+            /// GoCardless to send notifications to this customer.
+            /// </summary>
+            [JsonProperty("email")]
+            public string Email { get; set; }
+
+            /// <summary>
+            /// Customer's surname. Required unless a `company_name` is
+            /// provided.
+            /// </summary>
+            [JsonProperty("family_name")]
+            public string FamilyName { get; set; }
+
+            /// <summary>
+            /// Customer's first name. Required unless a `company_name` is
+            /// provided.
+            /// </summary>
+            [JsonProperty("given_name")]
+            public string GivenName { get; set; }
+
+            /// <summary>
+            /// An [IETF Language Tag](https://tools.ietf.org/html/rfc5646),
+            /// used for both language
+            /// and regional variations of our product.
+            /// 
+            /// </summary>
+            [JsonProperty("locale")]
+            public string Locale { get; set; }
+
+            /// <summary>
+            /// Key-value store of custom data. Up to 3 keys are permitted, with
+            /// key names up to 50 characters and values up to 500 characters.
+            /// </summary>
+            [JsonProperty("metadata")]
+            public IDictionary<String, String> Metadata { get; set; }
+
+            /// <summary>
+            /// The customer's postal code.
+            /// </summary>
+            [JsonProperty("postal_code")]
+            public string PostalCode { get; set; }
+
+            /// <summary>
+            /// The customer's address region, county or department. For US
+            /// customers a 2 letter
+            /// [ISO3166-2:US](https://en.wikipedia.org/wiki/ISO_3166-2:US)
+            /// state code is required (e.g. `CA` for California).
+            /// </summary>
+            [JsonProperty("region")]
+            public string Region { get; set; }
+
+            /// <summary>
+            /// For Swedish customers only. The civic/company number
+            /// (personnummer, samordningsnummer, or organisationsnummer) of the
+            /// customer. Must be supplied if the customer's bank account is
+            /// denominated in Swedish krona (SEK). This field cannot be changed
+            /// once it has been set.
+            /// </summary>
+            [JsonProperty("swedish_identity_number")]
+            public string SwedishIdentityNumber { get; set; }
+        }
+
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Mandate](#core-endpoints-mandates).
+        /// </summary>
+        [JsonProperty("mandate")]
+        public PayerAuthorisationMandate Mandate { get; set; }
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Mandate](#core-endpoints-mandates).
+        /// </summary>
+        public class PayerAuthorisationMandate
+        {
+
+            /// <summary>
+            /// Key-value store of custom data. Up to 3 keys are permitted, with
+            /// key names up to 50 characters and values up to 500 characters.
+            /// </summary>
+            [JsonProperty("metadata")]
+            public IDictionary<String, String> Metadata { get; set; }
+
+            /// <summary>
+            /// For ACH customers only. Required for ACH customers. A string
+            /// containing the IP address of the payer to whom the mandate
+            /// belongs (i.e. as a result of their completion of a mandate setup
+            /// flow in their browser).
+            /// </summary>
+            [JsonProperty("payer_ip_address")]
+            public string PayerIpAddress { get; set; }
+
+            /// <summary>
+            /// Unique reference. Different schemes have different length and
+            /// [character set](#appendix-character-sets) requirements.
+            /// GoCardless will generate a unique reference satisfying the
+            /// different scheme requirements if this field is left blank.
+            /// </summary>
+            [JsonProperty("reference")]
+            public string Reference { get; set; }
+
+            /// <summary>
+            /// A Direct Debit scheme. Currently "ach", "autogiro", "bacs",
+            /// "becs", "becs_nz", "betalingsservice", "pad" and "sepa_core" are
+            /// supported.
+            /// </summary>
+            [JsonProperty("scheme")]
+            public PayerAuthorisationScheme? Scheme { get; set; }
+        /// <summary>
+        /// A Direct Debit scheme. Currently "ach", "autogiro", "bacs", "becs",
+        /// "becs_nz", "betalingsservice", "pad" and "sepa_core" are supported.
+        /// </summary>
+        [JsonConverter(typeof(StringEnumConverter))]
+        public enum PayerAuthorisationScheme
+        {
+    
+            /// <summary>`scheme` with a value of "ach"</summary>
+            [EnumMember(Value = "ach")]
+            Ach,
+            /// <summary>`scheme` with a value of "autogiro"</summary>
+            [EnumMember(Value = "autogiro")]
+            Autogiro,
+            /// <summary>`scheme` with a value of "bacs"</summary>
+            [EnumMember(Value = "bacs")]
+            Bacs,
+            /// <summary>`scheme` with a value of "becs"</summary>
+            [EnumMember(Value = "becs")]
+            Becs,
+            /// <summary>`scheme` with a value of "becs_nz"</summary>
+            [EnumMember(Value = "becs_nz")]
+            BecsNz,
+            /// <summary>`scheme` with a value of "betalingsservice"</summary>
+            [EnumMember(Value = "betalingsservice")]
+            Betalingsservice,
+            /// <summary>`scheme` with a value of "pad"</summary>
+            [EnumMember(Value = "pad")]
+            Pad,
+            /// <summary>`scheme` with a value of "sepa_core"</summary>
+            [EnumMember(Value = "sepa_core")]
+            SepaCore,
+        }
+        }
+
+        /// <summary>
+        /// A unique key to ensure that this request only succeeds once, allowing you to safely retry request errors such as network failures.
+        /// Any requests, where supported, to create a resource with a key that has previously been used will not succeed.
+        /// See: https://developer.gocardless.com/api-reference/#making-requests-idempotency-keys
+        /// </summary>
+        [JsonIgnore]
+        public string IdempotencyKey { get; set; }
+    }
+
+        
+    /// <summary>
+    /// Updates a Payer Authorisation. Updates the Payer Authorisation with the
+    /// request data.Can be invoked as many times as needed. Only fields present
+    /// in the request will be modified. An empty array of incomplete_fields
+    /// means that the resource is valid. This endpoint has been designed this
+    /// way so you do not need to save any payer data on your servers or the
+    /// browser while still being able to implement a progressive solution, such
+    /// a multi-step form. <p class="notice"> Note that in order to update the
+    /// `metadata` attribute values it must be sent completely as it overrides
+    /// the previously existing values. </p>
+    /// </summary>
+    public class PayerAuthorisationUpdateRequest
+    {
+
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Customer Bank Account](#core-endpoints-customer-bank-accounts).
+        /// </summary>
+        [JsonProperty("bank_account")]
+        public PayerAuthorisationBankAccount BankAccount { get; set; }
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Customer Bank Account](#core-endpoints-customer-bank-accounts).
+        /// </summary>
+        public class PayerAuthorisationBankAccount
+        {
+
+            /// <summary>
+            /// Name of the account holder, as known by the bank. Usually this
+            /// is the same as the name stored with the linked
+            /// [creditor](#core-endpoints-creditors). This field will be
+            /// transliterated, upcased and truncated to 18 characters. This
+            /// field is required unless the request includes a [customer bank
+            /// account token](#javascript-flow-customer-bank-account-tokens).
+            /// </summary>
+            [JsonProperty("account_holder_name")]
+            public string AccountHolderName { get; set; }
+
+            /// <summary>
+            /// Bank account number - see [local
+            /// details](#appendix-local-bank-details) for more information.
+            /// Alternatively you can provide an `iban`.
+            /// </summary>
+            [JsonProperty("account_number")]
+            public string AccountNumber { get; set; }
+
+            /// <summary>
+            /// Account number suffix (only for bank accounts denominated in
+            /// NZD) - see [local details](#local-bank-details-new-zealand) for
+            /// more information.
+            /// </summary>
+            [JsonProperty("account_number_suffix")]
+            public string AccountNumberSuffix { get; set; }
+
+            /// <summary>
+            /// Bank account type. Required for USD-denominated bank accounts.
+            /// Must not be provided for bank accounts in other currencies. See
+            /// [local details](#local-bank-details-united-states) for more
+            /// information.
+            /// </summary>
+            [JsonProperty("account_type")]
+            public PayerAuthorisationAccountType? AccountType { get; set; }
+        /// <summary>
+        /// Bank account type. Required for USD-denominated bank accounts. Must
+        /// not be provided for bank accounts in other currencies. See [local
+        /// details](#local-bank-details-united-states) for more information.
+        /// </summary>
+        [JsonConverter(typeof(StringEnumConverter))]
+        public enum PayerAuthorisationAccountType
+        {
+    
+            /// <summary>`account_type` with a value of "savings"</summary>
+            [EnumMember(Value = "savings")]
+            Savings,
+            /// <summary>`account_type` with a value of "checking"</summary>
+            [EnumMember(Value = "checking")]
+            Checking,
+        }
+
+            /// <summary>
+            /// Bank code - see [local details](#appendix-local-bank-details)
+            /// for more information. Alternatively you can provide an `iban`.
+            /// </summary>
+            [JsonProperty("bank_code")]
+            public string BankCode { get; set; }
+
+            /// <summary>
+            /// Branch code - see [local details](#appendix-local-bank-details)
+            /// for more information. Alternatively you can provide an `iban`.
+            /// </summary>
+            [JsonProperty("branch_code")]
+            public string BranchCode { get; set; }
+
+            /// <summary>
+            /// [ISO 3166-1 alpha-2
+            /// code](http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements).
+            /// Defaults to the country code of the `iban` if supplied,
+            /// otherwise is required.
+            /// </summary>
+            [JsonProperty("country_code")]
+            public string CountryCode { get; set; }
+
+            /// <summary>
+            /// [ISO 4217](http://en.wikipedia.org/wiki/ISO_4217#Active_codes)
+            /// currency code. Currently "AUD", "CAD", "DKK", "EUR", "GBP",
+            /// "NZD", "SEK" and "USD" are supported.
+            /// </summary>
+            [JsonProperty("currency")]
+            public string Currency { get; set; }
+
+            /// <summary>
+            /// International Bank Account Number. Alternatively you can provide
+            /// [local details](#appendix-local-bank-details). IBANs are not
+            /// accepted for Swedish bank accounts denominated in SEK - you must
+            /// supply [local details](#local-bank-details-sweden).
+            /// </summary>
+            [JsonProperty("iban")]
+            public string Iban { get; set; }
+
+            /// <summary>
+            /// Key-value store of custom data. Up to 3 keys are permitted, with
+            /// key names up to 50 characters and values up to 500 characters.
+            /// </summary>
+            [JsonProperty("metadata")]
+            public IDictionary<String, String> Metadata { get; set; }
+        }
+
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Customer](#core-endpoints-customers).
+        /// </summary>
+        [JsonProperty("customer")]
+        public PayerAuthorisationCustomer Customer { get; set; }
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Customer](#core-endpoints-customers).
+        /// </summary>
+        public class PayerAuthorisationCustomer
+        {
+
+            /// <summary>
+            /// The first line of the customer's address.
+            /// </summary>
+            [JsonProperty("address_line1")]
+            public string AddressLine1 { get; set; }
+
+            /// <summary>
+            /// The second line of the customer's address.
+            /// </summary>
+            [JsonProperty("address_line2")]
+            public string AddressLine2 { get; set; }
+
+            /// <summary>
+            /// The third line of the customer's address.
+            /// </summary>
+            [JsonProperty("address_line3")]
+            public string AddressLine3 { get; set; }
+
+            /// <summary>
+            /// The city of the customer's address.
+            /// </summary>
+            [JsonProperty("city")]
+            public string City { get; set; }
+
+            /// <summary>
+            /// Customer's company name. Required unless a `given_name` and
+            /// `family_name` are provided. For Canadian customers, the use of a
+            /// `company_name` value will mean that any mandate created from
+            /// this customer will be considered to be a "Business PAD"
+            /// (otherwise, any mandate will be considered to be a "Personal
+            /// PAD").
+            /// </summary>
+            [JsonProperty("company_name")]
+            public string CompanyName { get; set; }
+
+            /// <summary>
+            /// [ISO 3166-1 alpha-2
+            /// code.](http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2#Officially_assigned_code_elements)
+            /// </summary>
+            [JsonProperty("country_code")]
+            public string CountryCode { get; set; }
+
+            /// <summary>
+            /// For Danish customers only. The civic/company number (CPR or CVR)
+            /// of the customer. Must be supplied if the customer's bank account
+            /// is denominated in Danish krone (DKK).
+            /// </summary>
+            [JsonProperty("danish_identity_number")]
+            public string DanishIdentityNumber { get; set; }
+
+            /// <summary>
+            /// Customer's email address. Required in most cases, as this allows
+            /// GoCardless to send notifications to this customer.
+            /// </summary>
+            [JsonProperty("email")]
+            public string Email { get; set; }
+
+            /// <summary>
+            /// Customer's surname. Required unless a `company_name` is
+            /// provided.
+            /// </summary>
+            [JsonProperty("family_name")]
+            public string FamilyName { get; set; }
+
+            /// <summary>
+            /// Customer's first name. Required unless a `company_name` is
+            /// provided.
+            /// </summary>
+            [JsonProperty("given_name")]
+            public string GivenName { get; set; }
+
+            /// <summary>
+            /// An [IETF Language Tag](https://tools.ietf.org/html/rfc5646),
+            /// used for both language
+            /// and regional variations of our product.
+            /// 
+            /// </summary>
+            [JsonProperty("locale")]
+            public string Locale { get; set; }
+
+            /// <summary>
+            /// Key-value store of custom data. Up to 3 keys are permitted, with
+            /// key names up to 50 characters and values up to 500 characters.
+            /// </summary>
+            [JsonProperty("metadata")]
+            public IDictionary<String, String> Metadata { get; set; }
+
+            /// <summary>
+            /// The customer's postal code.
+            /// </summary>
+            [JsonProperty("postal_code")]
+            public string PostalCode { get; set; }
+
+            /// <summary>
+            /// The customer's address region, county or department. For US
+            /// customers a 2 letter
+            /// [ISO3166-2:US](https://en.wikipedia.org/wiki/ISO_3166-2:US)
+            /// state code is required (e.g. `CA` for California).
+            /// </summary>
+            [JsonProperty("region")]
+            public string Region { get; set; }
+
+            /// <summary>
+            /// For Swedish customers only. The civic/company number
+            /// (personnummer, samordningsnummer, or organisationsnummer) of the
+            /// customer. Must be supplied if the customer's bank account is
+            /// denominated in Swedish krona (SEK). This field cannot be changed
+            /// once it has been set.
+            /// </summary>
+            [JsonProperty("swedish_identity_number")]
+            public string SwedishIdentityNumber { get; set; }
+        }
+
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Mandate](#core-endpoints-mandates).
+        /// </summary>
+        [JsonProperty("mandate")]
+        public PayerAuthorisationMandate Mandate { get; set; }
+        /// <summary>
+        /// All details required for the creation of a
+        /// [Mandate](#core-endpoints-mandates).
+        /// </summary>
+        public class PayerAuthorisationMandate
+        {
+
+            /// <summary>
+            /// Key-value store of custom data. Up to 3 keys are permitted, with
+            /// key names up to 50 characters and values up to 500 characters.
+            /// </summary>
+            [JsonProperty("metadata")]
+            public IDictionary<String, String> Metadata { get; set; }
+
+            /// <summary>
+            /// For ACH customers only. Required for ACH customers. A string
+            /// containing the IP address of the payer to whom the mandate
+            /// belongs (i.e. as a result of their completion of a mandate setup
+            /// flow in their browser).
+            /// </summary>
+            [JsonProperty("payer_ip_address")]
+            public string PayerIpAddress { get; set; }
+
+            /// <summary>
+            /// Unique reference. Different schemes have different length and
+            /// [character set](#appendix-character-sets) requirements.
+            /// GoCardless will generate a unique reference satisfying the
+            /// different scheme requirements if this field is left blank.
+            /// </summary>
+            [JsonProperty("reference")]
+            public string Reference { get; set; }
+
+            /// <summary>
+            /// A Direct Debit scheme. Currently "ach", "autogiro", "bacs",
+            /// "becs", "becs_nz", "betalingsservice", "pad" and "sepa_core" are
+            /// supported.
+            /// </summary>
+            [JsonProperty("scheme")]
+            public PayerAuthorisationScheme? Scheme { get; set; }
+        /// <summary>
+        /// A Direct Debit scheme. Currently "ach", "autogiro", "bacs", "becs",
+        /// "becs_nz", "betalingsservice", "pad" and "sepa_core" are supported.
+        /// </summary>
+        [JsonConverter(typeof(StringEnumConverter))]
+        public enum PayerAuthorisationScheme
+        {
+    
+            /// <summary>`scheme` with a value of "ach"</summary>
+            [EnumMember(Value = "ach")]
+            Ach,
+            /// <summary>`scheme` with a value of "autogiro"</summary>
+            [EnumMember(Value = "autogiro")]
+            Autogiro,
+            /// <summary>`scheme` with a value of "bacs"</summary>
+            [EnumMember(Value = "bacs")]
+            Bacs,
+            /// <summary>`scheme` with a value of "becs"</summary>
+            [EnumMember(Value = "becs")]
+            Becs,
+            /// <summary>`scheme` with a value of "becs_nz"</summary>
+            [EnumMember(Value = "becs_nz")]
+            BecsNz,
+            /// <summary>`scheme` with a value of "betalingsservice"</summary>
+            [EnumMember(Value = "betalingsservice")]
+            Betalingsservice,
+            /// <summary>`scheme` with a value of "pad"</summary>
+            [EnumMember(Value = "pad")]
+            Pad,
+            /// <summary>`scheme` with a value of "sepa_core"</summary>
+            [EnumMember(Value = "sepa_core")]
+            SepaCore,
+        }
+        }
+    }
+
+        
+    /// <summary>
+    /// Submits all the data previously pushed to this PayerAuthorisation for
+    /// verification.This time, a 200 HTTP status is returned if the resource is
+    /// valid and a 422 error response in case of validation errors. After it is
+    /// successfully submitted, the Payer Authorisation can no longer be edited.
+    /// </summary>
+    public class PayerAuthorisationSubmitRequest
+    {
+    }
+
+        
+    /// <summary>
+    /// Confirms the Payer Authorisation, indicating that the resources are
+    /// ready to be created.
+    /// A Payer Authorisation cannot be confirmed if it hasn't been submitted
+    /// yet.
+    /// 
+    /// <p class="notice">
+    ///   The main use of the confirm endpoint is to enable integrators to
+    /// acknowledge the end of the setup process. 
+    ///   They might want to make the payers go through some other steps after
+    /// they go through our flow or make them go through the necessary
+    /// verification mechanism(upcomming feature). 
+    /// </p>
+    /// </summary>
+    public class PayerAuthorisationConfirmRequest
+    {
+    }
+
+    /// <summary>
+    /// An API response for a request returning a single payer authorisation.
+    /// </summary>
+    public class PayerAuthorisationResponse : ApiResponse
+    {
+        /// <summary>
+        /// The payer authorisation from the response.
+        /// </summary>
+        [JsonProperty("payer_authorisations")]
+        public PayerAuthorisation PayerAuthorisation { get; private set; }
+    }
+}
diff --git a/README.md b/README.md
index d19b50e..4694709 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ For full details of the GoCardless API, see the [API docs](https://developer.goc
 
 To install `GoCardless`, run the following command in the [Package Manager Console](https://docs.microsoft.com/en-us/nuget/tools/package-manager-console)
 
-`Install-Package GoCardless -Version 4.4.0`
+`Install-Package GoCardless -Version 4.5.0`
 
 
 ## Usage