Diagnosis
The following criteria apply to the payment recipient's bank accountnumber:
Card category code '04' or '15': the bank account number has eitherseven or eight digits. If the bank account number consists of eightdigits, then the first digit must be either a '7', an '8' or a '9'.
Card category code '71' or '75': the bank account number consists ofeight digits. The first digit must be either a '0', '1', '2', '3', '4,'5' or '6'.

Procedure
Check the bank account number entered.