IBAN Validation Errors
Understand common IBAN validation errors and learn how to fix them. Click on an error to see detailed solutions.
Invalid IBAN Checksum
The IBAN check digits (positions 3-4) do not match the calculated checksum using the MOD-97 algorithm. This means the IBAN contains an error.
Wrong IBAN Length
The IBAN does not have the correct number of characters for the specified country. Each country has a fixed IBAN length.
Invalid Country Code
The first two letters of the IBAN do not represent a valid ISO 3166-1 country code, or the country does not use IBAN.
Invalid Characters in IBAN
The IBAN contains characters that are not allowed. IBANs can only contain uppercase letters (A-Z) and digits (0-9).
Invalid Bank Code
The bank identifier portion of the IBAN does not match a valid bank code for the specified country.
IBAN Rejected by Bank
Your IBAN was rejected during a payment or transfer. This can happen for various reasons even if the format is correct.