To obtain a slip print system in which identity can be recognized among respective cut pieces of sheet, forgery can be rendered difficult and illegality can be reduced.

A print image A, where the print position and the print angle for a slip sheet are different from issue to issue of a slip R, is printed on a separating position M of the slip R issued by printing required items on the slip sheet. When the printed and issues slip R is separated at the separating position M, the print image A is split at that separating position. Since the split print image A serves as a tally impression, identity can be recognized among respective cut pieces of sheet R1, R2 and since the print image A is printed while differentiating the print position and print angle from issue to issue of the slip R, forgery can be rendered difficult and illegality can be reduced.