How can the CCL reduce potential security vulnerabilities?

The Canceled Card List allows facilities and vessels to determine if TSA canceled a TWIC® card. If TSA determines that a TWIC® cardholder is ineligible for a TWIC® or poses a potential threat to national or transportation security, the cardholder’s TWIC® will be listed on the Canceled Card List. Using this information, facility security officials can make informed decisions on granting cardholders unescorted access to secure areas.