PAPER SHEET PROCESSING DEVICE

摘要

Disclosed herein is a paper sheet processing device 100 including: a hopper unit 2 configured to take in paper sheets; a recognition unit 3 configured to read serial numbers of the paper sheets taken in through the hopper unit 2; a database 1202 configured to store the serial numbers read by the recognition unit 3; and a control unit 120 configured to process the paper sheets. The control unit 120 searches the serial numbers stored in the database 1202 for any duplicated serial number, and detects, when finding any duplicated serial number, that duplicate processes have been performed on a paper sheet identified by the duplicated serial number.