On the international wire transfer the box says:"IBAN / Account Number:".
Just looked at some statement it has (rough translations): account number; transactions account (whatever this is supposed to mean).
I'm a bit new to this.
Are we talking about bitstamp?
Because since verification is mandatory, you should already have sent them all the relevant paperwork to identify your bank account.
This means that no matter if you choose International or SEPA, all the required information are already prefilled for you.
However if you are in Europe, pick EU Bank (SEPA).