Patent ID: 7872768

Claim:
An image forming apparatus comprising: an image forming unit that forms an image on a sheet; a storage unit that stores identification data for identifying said sheet and a client name for identifying a client corresponding to said sheet while making the identification data and the client name associate with each other: a writing unit that writes said client name and said identification data in a tag allocated to said sheet, said tag including a communication unit that transmits and receives information, and an information storage unit that stores information, a reading unit that reads information in said tag allocated to each sheet; a generating unit that generates notification information for announcing an exit status of said each sheet by comparing the information read by said reading unit, to the information stored in said storage unit wherein said exit status includes a determination of a sheet having an erroneous exit status; a detecting unit that detects that a discharged sheet is pulled out and that a job is pulled out based on said read information and said stored information; a determining unit that calculates a number of pulled out sheets and a number of pulled out jobs and determines based on said calculations that a sheet has an erroneous exit status; and a notification unit that announces said exit status, including an erroneous exit status, based on said notification information.