| 摘要 |
PROBLEM TO BE SOLVED: To optimize balance of electronic currency available with a card.SOLUTION: A card management server 2 includes: a balance storage unit 21 storing balance of electronic currency charged in association with identification information stored in a card 11; an acquisition unit 241 acquiring purchase amount information indicating a purchase amount transmitting from a store terminal when a user purchases a merchandise or service in a store with the card 11; and a charge unit 242 charging electronic currency corresponding to a balance amount between the purchase amount and the balance of electronic currency, in association with the identification information.SELECTED DRAWING: Figure 11 |
