A system that enables recipients of letters, flats and/or packages (hereinafter "mail") that are addressed to a recipient to determine the identity of the person or group that placed a indicia and other information on mail, i.e., the person or group who was issued unique stamps and/or labels by the post. This invention accomplishes the foregoing by storing unique information that is affixed to mail and the identify of the mailer; having a scanner at a receptacle read the unique information before mail is permitted to enter the interior of the receptacle, and communicating to the recipient information regarding the delivered mail.