A system that determines if mail contains life-harming materials before the mail
enters the interior of a receptacle, i.e., mail box. This invention accomplishes
the foregoing by issuing identification cards that uniquely identify mailers; having
a scanner at a receptacle read the identification card and send the unique identifying
code contained in the card to a data center that checks if the card is genuine;
and stores the card's unique code before mail is permitted to enter the interior
of the receptacle.
