Electronic receipt system, server, and method for electronic receipt system

An electronic receipt system, comprising:

• an electronic receipt server of an electronic receipt service provided to a plurality of members and a plurality of stores, each member of the electronic receipt service having a receipt service ID;
• and
• a plurality of store systems corresponding to the plurality of stores, each store system providing a customer loyalty program, each customer of the customer program having a program member ID, the plurality of store systems being connected to the electronic receipt server by a network connection, wherein
• each store system includes:
• a point-of-sale terminal at which a customer can settle a sales transaction and enter a receipt service ID or a program member ID;
• a POS server configured to receive receipt data from the point-of-sale terminal along with a receipt service ID or a program member ID entered in the sales transaction;
• and
• a customer server configured to:
• receive the receipt data from the POS server,
• determine whether the received receipt data includes a receipt service ID or a program member ID,
• if the receipt data includes a receipt service ID, transmit the receipt data to the electronic receipt server and determine if the receipt service ID is associated with a program member ID and then, if so, update transaction data in a transaction history associated with the associated program member ID according to the receipt data, and
• if the receipt data includes a program member ID, determine if the program member ID is associated with a receipt service ID and then, if so, switch the program member ID in the receipt data with the associated receipt service ID, transmit the receipt data to the electronic receipt server with the switched receipt service ID, and update transaction data in a transaction history associated with program member ID according to the receipt data.

A server for use in an electronic receipt system, the server comprising:

• a storage unit including a customer database associating customers to program member IDs and a cooperation table associating program member IDs to electronic receipt service IDs;
• and
• a processor configured to:
• receive receipt data including a second identification code from a settlement terminal of the store for a customer transaction at the store then transmit the receipt data with the received second identification code to the second server;
• and
• a second control unit configured to receive receipt data including a first identification code from the settlement terminal of the store for a customer transaction and acquire a second identification code stored in association with the received first identification code from the storage unit, add the acquired second identification code to the receipt data and transmit the receipt data to the second server without the including the first identification code.