# gateway.bank_account.test_only

> For the complete machine-readable documentation index, see [llms.txt](https://apidocs.chargebee.com/llms.txt).


**gateway**

A test bank account was used in a live production environment. This happens when sandbox or test account credentials are submitted for a real transaction, or when saved test data is accidentally used for live transactions.

## Recommended Customer Message

The Bank account you entered can only be used for testing. Try again with a different bank account.

## Root Cause[](#root-cause)

-   **Test account used in production:** The bank account provided is configured for test environments and cannot be used for live transactions.
-   **Incorrect environment configuration:** The transaction was attempted using test credentials or accounts in a production environment.
-   **Saved test data used:** Test bank account details were accidentally stored and used for live transactions.
-   **Gateway restrictions:** The payment gateway prevents test accounts from being used outside sandbox environments.

## Troubleshooting and Solutions[](#troubleshooting-and-solutions)

-   Ask the customer to provide valid bank account details for live transactions.
-   Verify that the correct environment (production) is being used for the transaction.
-   Ensure that any saved test data is cleared from the customer's stored payment methods.
-   Retry the transaction after updating with valid bank account information.
-   Review payment gateway settings to prevent test accounts from being used in production environments.