Can I keep my old TWIC® on receipt of my new or replacement TWIC® card?

No. The TWIC® card is property of the federal government.

During the enrollment process, TWIC® applicants are required to acknowledge their understanding that when they receive or pick up a new/replacement TWIC®, or when their TWIC® card expires, they are responsible for turning in their previous TWIC®. On receipt of the new TWIC® NexGen card, please send the previous and/or expired TWIC® to the TSA address on the back of the card or return the card to an enrollment center.