| 摘要 |
PROBLEM TO BE SOLVED: To incite a user of a coupon issued by a coupon issuer to use another coupon issued by the coupon issuer.SOLUTION: User terminals 200A to C each comprise means which, when a coupon is used, transmits a contact address assigned to its own user terminal 200A, B or C with information indicating use of the coupon to a mediation server 300, and stores a contact address included in the coupon and a use history of the coupon. The mediation server 300 comprises means which, on receiving the information transmitted from the user terminal 200A, B or C, transmits the information to a corresponding coupon issuance terminal 100A, B or C of an issuance source of the coupon. The coupon issuance terminals 100A to C each comprise means which stores a used history of the coupon and the contact address included in the information transmitted from the mediation server 300. |
