| 摘要 |
PROBLEM TO BE SOLVED: To provide a credit card system which allows a user to pay a commodity price by using points to be obtained by a subsequent usage of a credit card.SOLUTION: A credit card system comprises: a claims DB 10B which stores claims information on commodities purchased by using a credit card; and claim object exclusion means which excludes a purchase price of a selected commodity by updating the claims DB 10B, under the condition that it is determined that the number of points calculated as points to be obtained by a subsequent use of the credit card reaches the number of points required in exchange for the selected commodity indicated by selected commodity information acquired by selected commodity acquisition means, when the credit card user selects the commodity whose price the user wants to pay with points to be obtained by the subsequent use of the credit card from among commodities whose prices are not paid yet by the user. |
