Have the bank verify that the IBAN is correct

Batch payments currently trigger an error message from the bank if an IBAN is incorrect, but they don’t specify where the error lies. In a batch of more than 20 transactions, this is like looking for a needle in a haystack, especially if the rest of the IBAN is correct. It would be great if Cirquly could validate the IBAN. Perhaps a 1-cent test payment from the customer? An online IBAN checker?