Understanding Bank Account Validation
To process bank transactions for France, the account information that you enter must be accurate to avoid service charges from the bank and possible rejection of electronic funds transfers. Electronic funds transfers can be rejected for payments; receipts can be rejected because of incomplete or incorrect account information.
The system automatically validates the Rélevé d'Identité Bancaire (R.I.B.), including the bank account and transit numbers, according to the standards set by the French banking authority. You must enter the R.I.B. key in the Control Digit field for the account information to be validated. The Modulus97 algorithm checks the R.I.B. key.