My US passport is nearly full, time to get a new one. Following all online instructions down to the part where I purchase a courier pass back envelope through the Thailand Post website...but to pay for the items in my cart, I must first set up an account (subscribe). It asks for a 13 digit ID number and tax ID number...our US passports are only 9 digits....Im very confused as to how to set up an account to get this envelope required. Anyone else successfully navigated this part of the process?