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AC01 – The format of the specified account number is incorrect

    AC01 – Format of the account number specified is not correct

    AC error message – Common when errors occur related to debtor and creditor accounts.

    Causes:

    • The beneficiary has provided an invalid IBAN

    • The sender has used incorrect IBAN data from their customer database

    • The sender experienced technical issues during the processing of the SCT instruction or during the conversion from BBAN to IBAN

    Solution:

    • The sender should contact the beneficiary to confirm the accuracy of the beneficiary’s IBAN

    • The sender should verify the database used to retrieve the IBAN or for the conversion from BBAN to IBAN