BEFORE beginning the CPS registration, you need to make sure that you know your ASU Posting ID number. You will have to enter your ASU Posting ID number as a part of the CPS registration process. IF YOU ENTER AN INCORRECT ASU POSTING ID, YOU WILL NOT RECEIVE THE PROPER CREDIT FOR YOUR CPS ANSWERS. What is my ASU Posting ID? After you learn your correct posting ID you will find a link with more information about CPS registration. I am 100% sure that I know my Posting ID.