Patent ID: 7559458

Claim:
A validity assurance system, comprising: a terminal apparatus that generates a slip based on ship item data representing a slip item and slip content data representing a slip content corresponding to the slip item; a slip management apparatus including a slip management database that stores the slip content data of the slip generated by the terminal apparatus; and a voucher issuing apparatus that generates a voucher based on the slip content data stored in the slip management database, wherein the terminal apparatus includes: a first connection order data storage part that stores first connection order data representing a connection order of the slip content data; a first character string data generating part that connects the slip content data in accordance with the connection order represented by the first connection order data to generate first character string data; and a slip identification code generating part that generates a slip identification code determined uniquely from the first character string data, the voucher issuing apparatus includes: a second connection order data storage part that stores second connection order data representing a connection order of the slip content data; a second character string data generating part that connects the slip content data in accordance with the connection order represented by the second connection order data to generate second character string data; and a voucher identification code generating part that generates a voucher identification code determined uniquely from the second character string data, and in a case where the slip identification code generated by the slip identification code generating part is matched with the voucher identification code generated by the voucher identification code generating part, validity of the voucher is assured.