Hi,
please install the script that I sent to you in the attached file, (BF->Configuration->Package install->Select file->Package installer).
If yes, you will find this validation in Manage Script called -> ff_validIBAN
If you add the element to your form, you can add this validation to that element.
Go to this element's properties->Validation->check Library and select this validation (ff_validIBAN).
It is all!
Let me know the result!
Regards,
Mirko
