Check 21 allows banks to convert a paper-based check into an electronic
image, known as a substitute check, to expedite the movement of checks
through the U.S. payment system by eliminating the physical transport of
paper-based checks.When a local government receives a paper check, it is converted
into an electronic image that is moved through the payment system.The
electronic image carries the same information as the original paper check,which
is destroyed when it is converted into an electronic image.Any future requests
for a copy of a check are made from the electronic image. Check 21 makes the
check-clearing process faster, and has helped reduce check-clearing float.