Why do I need to bring my admission ticket if it's not acceptable ID?
While it is true that your admission ticket alone is not sufficient identification for you to be admitted to the test room, it is still extremely important for you to bring it with you to the test center on test day.
Once your room is ready to begin testing, your supervisor will ask you to complete basic identifying information on the front page of your answer document. On the left side of your admission ticket is a box called "Matching Information." Your supervisor will instruct you to copy this information exactly as it appears, even if incorrect, into the corresponding blocks on your answer document.
If you do not copy the Matching Information from your admission ticket exactly or do not bring your admission ticket with the Matching Information, your scores will be delayed and your reports may not reach the colleges you selected in time.
Your admission ticket also tells you where and when to report on test day. It may also contain messages specific to your assigned test center, such as what to wear, where to park, which building or entrance to use on test day, etc. Remember that you will not be admitted to test if you are not at the test center by 8:00 a.m.