An image forming device for executing an authentication print job
including: a communication interface unit for receiving print data; a job
data holding unit for holding job data based on the print data for the
authentication print job; a user authentication unit for outputting the
result of the user authentication to a control unit; a job execution unit
for executing a job based on the job data; a job list generating unit for
generating a list of the authentication print jobs; a display unit for
displaying the list; and the control unit for, in receiving the result of
the user authentication, acquiring a number of the authentication print
jobs of the user authenticated by the user authentication, wherein, when
the number is greater than or equal to a predetermined number, the
control unit causes the job list generating unit to generate the list of
the authentication print jobs of the authenticated user, the display unit
to display the list, and the job execution unit to execute the
authentication print job of the authenticated user.