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03 - Invalid merchant

This can be returned by Westpac when there is a problem with the merchant configuration. This can also be returned for AMEX transactions when there is a problem with the setup at American Express®. This code can be returned from an issuing bank if they don't like the acquiring bank. An example of this would be someone trying to pay their speeding fine with an overseas credit card. The overseas issuing bank would return a 03, indicating that they wouldn't allow the transaction over the internet for an Australian bank.

See also: Full List of Credit Card Response Codes


The information contained in this publication is provided for learning purposes only and is subject to change. Revisions may be issued from time to time that encompass changes or additions to this module.

This is a guide only and it is not comprehensive. It does not impinge on or overrule any formal arrangement you may enter into with the Bank. The Bank and its officers shall not have any liability for any losses of any kind incurred in connection with any action, inaction or decision taken in reliance on the information herein or for any inaccuracies, errors or omissions. In this publication references to the "Bank" are to Westpac Banking Corporation ABN 33 007 457 141 and to any of its operating Divisions, including BankSA and St.George.