A registration settlement apparatus comprises an acquiring module configured to acquire a commodity list from an external device; an input module configured to input designation of a commodity; a registering module configured to register a commodity displayed in the list as a purchased commodity if the list is acquired by the acquiring module and to register a designated commodity as a purchased commodity in a distinguishable manner from the commodity registered from the list if the designation is input by the input module; a granting module configured to grant mutually different privileges for purchase of the commodity registered as the purchased commodity by the registering module depending on whether the commodity registered from the list is contained in the commodity registered as the purchased commodity; and a settlement module configured to perform a processing for settling a price of a commodity registered as the purchased commodity by the registering module.