An image forming apparatus includes an image forming unit configured to form an image on a sheet of perforated paper; an input unit configured to receive first information and second information; and a processor configured to display an alarm display without performing sheet-passing of the sheet of perforated paper. The first information is information concerning the sheet of perforated paper on which an image is to be formed by the image forming unit and the second information is information concerning whether to perform automatic double-sided printing on the sheet of perforated paper or not. The processor is configured to display the alarm display in a case where the automatic double-sided printing is instructed and it is determined that the sheet of perforated paper has a cut-off portion.