Mail signature verification system

A mail signature verification system comprising:

• a) a mail piece comprising:
• i) a signature area for receiving a signature;
• ii) a signature cover configured to extend over the signature in the signature area after the mail piece is signed;
• iii) a security window in the signature cover that is effectively opaque to prevent recognition of the signature when an 80 lumen light is directed onto the security window;
• b) a mail processing machine comprising:
• i) a signature reading station comprising:
• a compression roller;
• a press-plate configured to press against the compression roller;
• a camera configured to take a digital photograph of the security window as the mail piece is moved through the signature reading station;
• and
• a light assembly comprising a element configured to emit light onto the security window in the signature reading station;
• ii) an inlet actuator configured to move the mail piece into the signature reading station;
• and
• iii) an outlet actuator configured to move the mail piece out of the signature reading station;
• c) a computer configured to receive the digital photograph and operate a software program to analyze the digital photograph to confirm the signature on the mail piece;
• wherein the software subtracts out grey scale pixels that are below an upper grey scale threshold and grey scale pixels that are above a lower grey scale threshold, thereby producing a binarized signature for signature verification;
• wherein the mail piece in an envelope;
• wherein the mail piece moves through the signature reading station without stopping;
• wherein the press plate comprises a translucent area to allow the digital photograph to be taken through the press plate;
• wherein the light element emits at least 50 lumens of light onto the security window of the mail piece;
• and
• wherein the camera takes the digital photograph along an offset angle from orthogonal to a plane of the security window when between the press plate and the compression roller.