diff --git a/packages/tasit-identity-contract/src/GnosisSafe.js b/packages/tasit-identity-contract/src/GnosisSafe.js
index 4b7f1fbb..c83fbb53 100644
--- a/packages/tasit-identity-contract/src/GnosisSafe.js
+++ b/packages/tasit-identity-contract/src/GnosisSafe.js
@@ -3,6 +3,7 @@ const { Contract, ERC20, ERC721 } = Action;
 const { ERC20Detailed } = ERC20;
 const { ERC721Full } = ERC721;
 import GnosisSafeUtils from "./GnosisSafeUtils";
+import ActionUtils from "tasit-action/dist/contract/Utils.js";
 
 import gnosisSafeABI from "../../tasit-contracts/abi/GnosisSafe.json";
 import erc20ABI from "../../tasit-contracts/abi/MyERC20Full.json";
@@ -25,9 +26,23 @@ const operations = {
 
 const { CALL } = operations;
 
+const areValidSigners = signers => {
+  const { isEthersJsSigner: isSigner } = ActionUtils;
+  const { isArray } = Array;
+
+  if (!isArray(signers)) return false;
+
+  const allAreValid = !signers.map(isSigner).includes(false);
+
+  if (!allAreValid) return false;
+
+  return true;
+};
+
 // Extended Gnosis Safe wallet contract with higher-level functions
 export default class GnosisSafe extends Contract {
   #utils;
+  #signers;
 
   constructor(address, wallet) {
     const abi = gnosisSafeABI;
@@ -35,14 +50,22 @@ export default class GnosisSafe extends Contract {
     this.#utils = new GnosisSafeUtils(this);
   }
 
-  transferERC20 = async (signers, tokenAddress, toAddress, value) => {
+  setSigners = signers => {
+    if (!areValidSigners(signers))
+      throw new Error(
+        `Cannot set invalid signers for the Gnosis Safe contract.`
+      );
+
+    this.#signers = signers;
+  };
+
+  transferERC20 = async (tokenAddress, toAddress, value) => {
     const data = this.#utils.encodeFunctionCall(erc20ABI, "transfer", [
       toAddress,
       value,
     ]);
     const etherValue = "0";
     const action = await this.#executeTransaction(
-      signers,
       data,
       tokenAddress,
       etherValue
@@ -50,7 +73,7 @@ export default class GnosisSafe extends Contract {
     return action;
   };
 
-  transferNFT = async (signers, tokenAddress, toAddress, tokenId) => {
+  transferNFT = async (tokenAddress, toAddress, tokenId) => {
     const fromAddress = this.getAddress();
     const data = this.#utils.encodeFunctionCall(erc721ABI, "safeTransferFrom", [
       fromAddress,
@@ -59,7 +82,6 @@ export default class GnosisSafe extends Contract {
     ]);
     const etherValue = "0";
     const action = await this.#executeTransaction(
-      signers,
       data,
       tokenAddress,
       etherValue
@@ -67,19 +89,14 @@ export default class GnosisSafe extends Contract {
     return action;
   };
 
-  transferEther = async (signers, toAddress, value) => {
+  transferEther = async (toAddress, value) => {
     const data = "0x";
     const etherValue = value;
-    const action = await this.#executeTransaction(
-      signers,
-      data,
-      toAddress,
-      etherValue
-    );
+    const action = await this.#executeTransaction(data, toAddress, etherValue);
     return action;
   };
 
-  addSignerWithThreshold = async (signers, newSignerAddress, newThreshold) => {
+  addSignerWithThreshold = async (newSignerAddress, newThreshold) => {
     const data = this.#utils.encodeFunctionCall(
       this.getABI(),
       "addOwnerWithThreshold",
@@ -87,19 +104,21 @@ export default class GnosisSafe extends Contract {
     );
     const to = this.getAddress();
     const etherValue = "0";
-    const action = await this.#executeTransaction(
-      signers,
-      data,
-      to,
-      etherValue
-    );
+    const action = await this.#executeTransaction(data, to, etherValue);
     return action;
   };
 
   // Note: Should we move this function to sync to keep same behavior as
   // contract's write functions that returns an Action object?
   // See more: https://github.com/tasitlabs/TasitSDK/issues/234
-  #executeTransaction = async (signers, data, toAddress, etherValue) => {
+  #executeTransaction = async (data, toAddress, etherValue) => {
+    const signers = this.#signers;
+
+    if (!signers)
+      throw new Error(
+        `Cannot send an action to Gnosis Safe contract without signers.`
+      );
+
     const to = toAddress;
 
     const operation = CALL;
diff --git a/packages/tasit-identity-contract/src/GnosisSafe.test.js b/packages/tasit-identity-contract/src/GnosisSafe.test.js
index c9383a98..0f6fa752 100644
--- a/packages/tasit-identity-contract/src/GnosisSafe.test.js
+++ b/packages/tasit-identity-contract/src/GnosisSafe.test.js
@@ -31,9 +31,12 @@ describe("GnosisSafe", () => {
 
     ephemeralWallet = Account.create();
 
+    const signers = [johnWallet];
+
     // Contract deployment setup with john (accounts[9]) as the only owner
     // To change that, edit the file "tasit-contract/3rd-parties/gnosis/scripts/2_deploy_contracts.js"
     gnosisSafe = new GnosisSafe(GNOSIS_SAFE_ADDRESS);
+    gnosisSafe.setSigners(signers);
 
     erc20 = new ERC20Full(ERC20_ADDRESS);
 
@@ -65,16 +68,11 @@ describe("GnosisSafe", () => {
     });
 
     it("contract account should send ethers back to owner", async () => {
-      const signers = [johnWallet];
       const { address: toAddress } = johnWallet;
       const value = ONE;
 
       gnosisSafe.setWallet(johnWallet);
-      const execTxAction = await gnosisSafe.transferEther(
-        signers,
-        toAddress,
-        value
-      );
+      const execTxAction = await gnosisSafe.transferEther(toAddress, value);
       await execTxAction.waitForNonceToUpdate();
 
       const balance = await provider.getBalance(GNOSIS_SAFE_ADDRESS);
@@ -90,14 +88,12 @@ describe("GnosisSafe", () => {
     });
 
     it("contract account should send ERC20 tokens back to owner", async () => {
-      const signers = [johnWallet];
       const tokenAddress = ERC20_ADDRESS;
       const { address: toAddress } = johnWallet;
       const value = ONE;
 
       gnosisSafe.setWallet(johnWallet);
       const action = await gnosisSafe.transferERC20(
-        signers,
         tokenAddress,
         toAddress,
         value
@@ -120,13 +116,11 @@ describe("GnosisSafe", () => {
     });
 
     it("contract account should send NFT tokens back to owner", async () => {
-      const signers = [johnWallet];
       const tokenAddress = NFT_ADDRESS;
       const { address: toAddress } = johnWallet;
 
       gnosisSafe.setWallet(johnWallet);
       const execTxAction = await gnosisSafe.transferNFT(
-        signers,
         tokenAddress,
         toAddress,
         tokenId
@@ -147,13 +141,11 @@ describe("GnosisSafe", () => {
     const thresholdBefore = await gnosisSafe.getThreshold();
     expect(`${thresholdBefore}`).to.equal(`1`);
 
-    const signers = [johnWallet];
     const { address: newSignerAddress } = ephemeralWallet;
     const newThreshold = `2`;
 
     gnosisSafe.setWallet(johnWallet);
     const action = await gnosisSafe.addSignerWithThreshold(
-      signers,
       newSignerAddress,
       newThreshold
     );