Participation in the Thumbprint Signature Program is a simple, low-cost way to deter identity theft and check fraud. Banks participating in the program ask non-customers requesting to cash checks to apply a thumbprint on the check, in addition to examining the standard forms of identification. The thumbprint serves as a positive ID for use by law enforcement if the check is fraudulent. The primary benefit of the program is that it serves as a deterrent. Those seeking to commit check fraud are unlikely to put their thumbprints on bogus checks.