An image forming apparatus providing services for general users, capable of getting rid of trouble to collect use charges. The image forming apparatus has: a connector to which a portable communication terminal is connected; a communication section for controlling the portable communication terminal connected to the connector, and controlling communication with the portable communication terminal and a management apparatus; a reading section for reading authentication information out of the portable communication terminal; an inquiry request section for sending the authentication information to the management apparatus, and requesting the management apparatus to inquire the electronic prepaid information based on the authentication information; a receiving section for receiving the electronic prepaid information replied by the management apparatus through the communication section; and an image forming control section for controlling whether to perform image forming processing or not on the basis of the electronic prepaid information.

 
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< Process for creation and display of merged digital images

> Technique for producing through watermarking highly tamper-resistant executable code and resulting "watermarked" code so formed

> Printing apparatus and information processing apparatus, control method thereof, program, and storage medium

~ 00501