1. An apparatus comprising: a processor; a memory; a setting unit configured to set an identifying value selected from plural different identifying values by a user; and a causing unit configured to cause a printing unit to print out a copy-forgery-inhibited pattern image corresponding to the set identifying value on first paper, wherein the causing unit causes the printing unit to print out plural different images and the plural different identifying values including the currently set identifying value on second paper, each value corresponding to a different one of the plural different identifying images, such that a user can distinctly recognize an image of the plural different images corresponding to the currently set identifying value on the second paper; wherein each image of the plural different images printed out on the second paper includes a first region and a second region having bigger dots than the first region, and a difference in density of the first and second regions in the each image is different.