They ask for it but you don't HAVE to present it. If you don't most airlines will ask you identity verification questions, similar to those you're asked when re

They ask for it but you don't HAVE to present it. If you don't most airlines will ask you identity verification questions, similar to those you're asked when retrieving your credit report. If everything matches up your ticket will get marked with SSSS[1] and you'll be sent through that additional security. 1: https://en.wikipedia.org/wiki/Secondary_Security_Screening_Selection https://en.wikipedia.org/wiki/Secondary_Security_Screening_S...