Greetings, Roberty!
First, I am not staff - so my answer isn't in any way "official".
But each ER which I have attended has happened this way: Shortly after arrival you should see either a sign or a friendly staff member or clusters of other friendly Furry Fans (we tend to "stick out" somewhat) leading to Convention Registration. There will probably be a line. When you get to the Registration Table, all that you will need will be your personal ID. You will be asked by the friendly staffer for for your name, and the name which you requested for your badge. It might be helpful to know and provide your Registration Number, as well.
Once the registration staffer is reasonably sure of your identity, you will be issued your convention badge and convention materials (con book, schedule, badge lanyard), and you are done! I don't believe that an actual physical "ticket" is involved, I've never had to present one nor been issued one.