Solution : https://service.sap.com/sap/support/notes/502543 (SAP Service marketplace login required)
Key words :
general settings -> set countries -> set country-specific checks, maintain customer master data, vendor master data, field t005-bnkey, t005-bnkey reason, source code corrections, enter iban numbers, current support package, support package, iban entries
Related Notes :
| 392091 | IBAN: Use for vendors and customers |