By installing the optional imprinter kit into the scanner, the user has the ability to print specific characters on to the document before or after scanning, depending on the scanner model. By printing serial numbers, the scanned data can be tracked, matched and/or indexed with the original document. The printed characters are read as front side image & function as pre-imprinter (front face of document only) for the Docu Mate 765 & 4790, & pre- and/or post-imprinter (front/back side of document) for the Docu Mate 4799.