CONTROL METHOD FOR A PRINT PROCESSING DEVICE, CONTROL METHOD FOR A RECEIPT PRINTING DEVICE, A PRINT PROCESSING DEVICE, A RECEIPT ISSUING SYSTEM, AND A PROGRAM

摘要

A method and system are provided for a receipt printing device that produces receipts. Encrypted data is necessary to produce the receipt to prevent forgery of the receipt. The encrypted data based on information, which can be transaction information, received from a POS terminal. The encrypted data will be printed on the receipt only when determined to be necessary.