If 'IBAN Validation Required' flag is checked for the network, then IBAN verification for Debtor IBAN, Creditor IBAN and creditor BIC is done against the IBAN format maintained for the respective country.

When the debit account is a valid GL for outbound transaction Debit IBAN, Debtor Name and Debtor Address fields are defaulted from PMDGLIBN if a record is available for that GL.

Please refer to Payments Core User manual for more details on IBAN check.