A multi-function peripheral (MFP) includes a function of performing a setting to attach an electronic signature to a file including data acquired by executing scanning of a document, attaching, based on the setting, at least one of a plurality of electronic signatures to the file including the data acquired by executing scanning of the document in response to a request received from a smartphone, the electronic signatures including a user signature corresponding to an authenticated user and a device signature corresponding to the MFP, and transmitting the file to which the electronic signature is attached to a communication terminal or the like.