Output device capable of preventing the leakage of confidential information

An output device, such as a multifunction peripheral, prints data transmitted from a portable terminal device via contactless communication in such a manner as to prevent leakage of the data from a medium on which the data is printed, while the convenience of outputting data via wireless communication is maintained. A multifunction peripheral includes plural communication units having different communication areas. A determination unit of the multifunction peripheral identifies one of the communication units that receives the data from the portable terminal device. Based on the type of the identified communication unit, such as a Bluetooth communication unit, it is determined whether the portable terminal device is within a predetermined communication area. When the portable terminal device is within the predetermined communication area, a granting unit grants output of the received data from the output device.