At the end of the registration process you will receive an email from Prometric with the subject heading "Prometric Exam Information". Please print out this document. This will contain an Appointment Summary including your ISAT ID number which should be quoted on any correspondence with the ISAT Office and Prometric. The ISAT ID is referred to on this document as the Order Confirmation Number.
This confirmation document is also your Admission Ticket - you must present a printout of this confirmation when you arrive at the test centre, along with your photographic identification.