To grasp a history of a document from a paper medium since when the paper document is obtained, the history of the paper document can not be confirmed on its paper surface.

A multifunction machine which performs copying operation has a QR code generating unit 53 which generates a QR code of a paper fingerprint ID of a second paper document created by printing image data of a read first paper document, a read disabling processing unit 65 which performs data processing so that a QR code detected from the read first paper document can not be read in a restorable state, and a printing executing unit 55 which creates the second paper document by printing the generated QR code additionally to the image data of the first paper document including the QR code data processed reading of which is disabled. A multifunction machine which performs verification has a read enabling processing unit 75 which restores into a readable state the code data reading of which is disabled out of the QR code detected from the image data of the read second paper document, and an information output unit 73 which acquires information relating to a paper fingerprint based upon the paper fingerprint ID acquired from the QR code made readable and outputs the information.