Image forming system and program between a portable terminal and an image forming device with confirmation feature

A non-transitory recording medium storing a computer readable program causes a computer included in a portable terminal to communicate with an image forming device to execute: a) a step of acquiring communication information from the image forming device via first wireless communication, the communication information being information for executing second wireless communication; b) a step of executing processing of confirming existence of a user who possesses the portable terminal in the vicinity of the image forming device; and c) a step of, on condition that existence of the user in the vicinity of the image forming device is confirmed in the step b), permitting registration processing of registering the communication information in the portable terminal in order to execute the second wireless communication, the communication information being communication information for the second wireless communication with the image forming device and being acquired in the step a).