Image forming system including cutting processor that cuts sheets in accordance with different conditions

An image forming system comprising:

• an image forming apparatus that forms a first image according to a job on a plurality of first sheets and inserts a second sheet between the plurality of first sheets;
• a cutting processor that sequentially performs cutting processing on the plurality of first sheets and the second sheet that are conveyed from the image forming apparatus;
• and
• a sheet discharging tray on which an output object obtained by the cutting processing on each of the plurality of first sheets and a slip sheet obtained by the cutting processing on the second sheet are stacked, the output object including the first image, wherein
• the image forming apparatus receives information on size of the first sheets from a user;
• determines a first cutting condition for the plurality of first sheets based on the information;
• and determines a second cutting condition for the second sheet based on the first cutting condition by adding a predetermined margin to the first cutting condition, the second cutting condition being different from the first cutting condition,
• the cutting processor performs the cutting processing on each of the plurality of first sheets in accordance with the first cutting condition, and performs the cutting processing on the second sheet in accordance with the second cutting condition, and
• the second sheet includes only the slip sheet among the output object and the slip sheet.