I have more than one KTN. Which should I use?

You may use any active KTN that you have been assigned. However, please verify that the airline has the first/middle/last name and correct date of birth that is associated with that KTN. Your individual reservation must include your KTN. Travelers can check with the airlines to verify their KTN is listed in their reservation. An incorrect name or date of birth on your reservation will prevent you from receiving proper consideration for TSA PreCheck®.