When an order for printing image data is placed via a network, a wrong agency or a wrong recipient can be prevented from being designated. A print order is placed by sending order information and image data to a DPE store. The order information includes recipient information. An order reception server refers to a table stored in a database for representing an order reception area of the DPE store, and judges whether or not the place of residence of a recipient is within the order reception area, based on the recipient information. If a result of the judgment is negative, the order reception server sends warning information to a user terminal. In this manner, a warning message notifying a user of the fact that the recipient or the DPE store may be wrong is displayed on a monitor.