To make customer check promptly and properly in response to a request for purchase of a 3rd app developed by a 3rd party using an application store operated in a foreign country. A management server 100 manages online store sale for making only an application stored in an app DB 250 and registered for online store sale available for purchase. The management server 100 comprises: an ordering processing unit 112 that judges whether the requested application to be purchased from a user is a 3rd app developed by a 3rd party; and a sales approval processing unit 113. If the application requested to be purchased is the 3rd app, the sales approval processing unit 113 notifies the user of a state waiting for approval by the 3rd party, and gains approval of sale of the 3rd app by transmitting a notification to the 3rd party requesting customer check.