If your bike disappears and is later recovered by the police, the only way they'll be able to get it back to you is if they have some kind of record that connects you to the bike. That's where registration comes in.
After you complete the registration process, bring your TUID and your bike to any of these locations to complete the process:
Administrative Office: 1101 W. Montgomery Avenue
Patrol / Police Headquarters: 1801 N. 11th Street
Center Station: Beasley and Polett Walk