An IBAN comprises data banks use to establish your account number, your bank's country of origin, and other account information.
The code is verified to the IBAN record when you make a payment to guarantee that the beneficiary is correct.
The transaction will fail if you supply the wrong IBAN and no account is associated with it. However, the bank will complete the transaction if a matching account exists. You need to be careful as the bank can only reverse the transfer if the recipient's funds went to assents.
In addition, to ensure that valid IBANs are error-free, most banks use an IBAN checker, also known as an IBAN lookup.