A document that is issued when you check in with your seat number and the number on the printer door. You will need to have important documents to go through a security checkpoint before your machine.
Document issued when you check in with your seat number and serial number on the door of the printer. You need to have an important document to pass the security check before boarding your machine.
When you check-in documents issued by your seat number and number of strong printed on it. You need to have the important document this through the security checkpoint before boarding.