3724928 - IBAN Automatically Populated Across Bank Details for Same Bank Key and Account Number in Business Partner

SAP S/4HANA Cloud Public Edition

This behavior is as per system design.

• In the system, the IBAN is treated as a shared object, where the key is a combination of the bank key and account number. Once an IBAN is assigned to a specific combination, it is automatically reused whenever the same details are entered.
• To avoid this automatic assignment, maintain the IBAN without entering the account number. If required, the account number can be maintained separately in another set of bank details for the same Business Partner. The payment program will then determine the correct bank details based on the configured payment method settings.
• It is recommended to maintain IBAN independently without linking it to an account number. Assigning an IBAN to bank details that already contain an account number, or deriving the account number from the IBAN within the same bank details, should only be done in exceptional cases.

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