A device of an example is a portable information processing device performing settlement processing concerning purchase of a merchandise article or a right in cooperation with a given server, comprising: a non-contact communication unit performing non-contact communication with a data storage medium; a data acquisition unit acquiring data stored in the data storage medium, through the non-contact communication unit as a part of the settlement processing; a settlement processing unit performing settlement based on the data acquired by the data acquisition unit, in cooperation with the server, as a part of the settlement processing; a detection unit detecting at least one of attitude, movement, and a placement state of the own device; and a restriction unit acquiring a detection result from the detection unit and then, when the detection result does not satisfy a given condition, restricting performing of at least a part of the settlement processing.