Image forming apparatus

An image forming apparatus, comprising:

• an operation inputter that receives an execution command of a service involving reading of a document from a user;
• a document reader that reads the document placed on a document table and generates image data based on an execution command of a job related to the service;
• an image outputter that outputs an image formed based on the image data;
• a document size detector that detects a size of the document placed on the document table;
• a storage that stores the size of the document;
• a document cover opening/closing detector that detects opening/closing of a document cover of the document table;
• an unremoved document notification provider that notifies that the document is forgotten to be removed from the document table;
• and
• one or a plurality of controllers that control the operation inputter, the document reader, the image outputter, the document size detector, the storage, the document cover opening/closing detector, and the unremoved document notification provider,
• wherein when the document cover opening/closing detector detects that the document cover is opened at start of the job, the controller allows the storage to store the size of the document detected by the document size detector,
• after completion of the job, in a case where the document cover opening/closing detector detects that the document cover is opened before a predetermined standby time elapses, the document size detector is allowed to detect the size of the document again, and in a case where the document is detected, the unremoved document notification provider is allowed to notify that the document is forgotten to be removed, and
• on the other hand, in a case where even after the standby time has elapsed, the document cover opening/closing detector does not detect that the document cover is opened, the unremoved document notification provider is allowed to notify that the document is forgotten to be removed.