Abstract: A system comprising a purchase information receiving unit for receiving item purchase information including the information of a store at which a purchaser purchases an item using a credit card and the information of the purchase cost at said store, a contribution condition determining unit for searching whether or not the store is a member who agrees to a contribution to a charity (NPO) and determines contribution conditions such as the algorithm for determining its amount of contribution and the designated charity when the store is such a member, and a contribution execution processing unit for paying the amount in which said algorithm is applied to the purchase cost to the designated charity as the amount of contribution.