No, TSA PreCheck benefits are not transferable, even between family members. Your "Known Traveler Number" (KTN) is uniquely tied to your identity, fingerprints, and background check. If your mom does not have her own TSA PreCheck membership, the "TSA PRECHK" indicator will not appear on her boarding pass, and she will be required to go through the standard security line (removing shoes, laptops, and liquids). The only exception is for children aged 12 and under, who are allowed to accompany an enrolled parent or guardian through the PreCheck lane. In 2026, the TSA has become even more automated with facial recognition technology at many checkpoints; the system matches your face to your specific boarding pass and KTN. If your mom tries to use your KTN on her ticket, the airline's system will likely flag the name mismatch, and she could face questioning or the cancellation of the ticket. If she travels frequently, the best move is for her to apply for her own membership, which currently costs $78 for five years.