diff --git a/pkg/api/transactions.go b/pkg/api/transactions.go
index 10efb21e..6e264837 100644
--- a/pkg/api/transactions.go
+++ b/pkg/api/transactions.go
@@ -689,10 +689,6 @@ func (a *TransactionsApi) TransactionCreateHandler(c *core.WebContext) (any, *er
 		return nil, errs.ErrTransactionDestinationAmountCannotBeSet
 	}
 
-	if transactionCreateReq.Type == models.TRANSACTION_TYPE_TRANSFER && (transactionCreateReq.SourceAmount < 0 || transactionCreateReq.DestinationAmount < 0) {
-		return nil, errs.ErrTransferTransactionAmountCannotBeLessThanZero
-	}
-
 	uid := c.GetCurrentUid()
 	user, err := a.users.GetUserById(c, uid)
 
@@ -823,10 +819,6 @@ func (a *TransactionsApi) TransactionModifyHandler(c *core.WebContext) (any, *er
 		return nil, errs.ErrTransactionTypeInvalid
 	}
 
-	if transaction.Type == models.TRANSACTION_DB_TYPE_TRANSFER_OUT && (transactionModifyReq.SourceAmount < 0 || transactionModifyReq.DestinationAmount < 0) {
-		return nil, errs.ErrTransferTransactionAmountCannotBeLessThanZero
-	}
-
 	allTransactionTagIds, err := a.transactionTags.GetAllTagIdsOfTransactions(c, uid, []int64{transaction.TransactionId})
 
 	if err != nil {
diff --git a/pkg/services/transactions.go b/pkg/services/transactions.go
index d331f644..1650dbde 100644
--- a/pkg/services/transactions.go
+++ b/pkg/services/transactions.go
@@ -599,6 +599,11 @@ func (s *TransactionService) ModifyTransaction(c core.Context, transaction *mode
 			return errs.ErrTransactionSourceAndDestinationAmountNotEqual
 		}
 
+		if (transaction.Type == models.TRANSACTION_DB_TYPE_TRANSFER_OUT || transaction.Type == models.TRANSACTION_DB_TYPE_TRANSFER_IN) &&
+			(transaction.Amount < 0 || transaction.RelatedAccountAmount < 0) {
+			return errs.ErrTransferTransactionAmountCannotBeLessThanZero
+		}
+
 		oldSourceAccount, oldDestinationAccount, err := s.getOldAccountModels(sess, transaction, oldTransaction, sourceAccount, destinationAccount)
 
 		if err != nil {
@@ -1566,6 +1571,11 @@ func (s *TransactionService) doCreateTransaction(sess *xorm.Session, transaction
 		return errs.ErrTransactionSourceAndDestinationAmountNotEqual
 	}
 
+	if (transaction.Type == models.TRANSACTION_DB_TYPE_TRANSFER_OUT || transaction.Type == models.TRANSACTION_DB_TYPE_TRANSFER_IN) &&
+		(transaction.Amount < 0 || transaction.RelatedAccountAmount < 0) {
+		return errs.ErrTransferTransactionAmountCannotBeLessThanZero
+	}
+
 	// Get and verify category
 	err = s.isCategoryValid(sess, transaction)