An image forming system includes an information management unit, a determining unit, and at least one image forming unit. The information management unit stores and manages print information. The determining unit determines whether or not execution of a printing process regarding the print information is allowed. Each image forming unit prints and outputs print information acquired from the information management unit on a recording medium in accordance with a determination result of the determining unit. The determining unit includes a first authenticating unit and a second authenticating unit. The first authenticating unit performs authentication to determine whether or not execution of processing before printing and outputting the print information on a recording medium is allowed. The second authenticating unit performs authentication after completion of the authentication performed by the first authenticating unit to determine whether or not printing and output of the print information on the recording medium is allowed.