PURPOSE: To improve job efficiency, customer service and credit by utilizing sales registered data to be printed on a receipt as it is and issuing a written guarantee by printing other guarantee information closely to the sales registered data corresponding to the data.

CONSTITUTION: This processor is composed by connecting plural terminal machines 10 and a host equipment 30 via a wire or radio data communication line 1. When an article registration is performed, discrimination means 11 and 12 retrieves a discrimination code storage means 13 GD and discriminates whether an issue-possible discrimination code is stored in the article data or not. When it is discriminated that the code is stored, written guarantee information reading control means 11, 12, 31 and 32 retrieve a written guarantee information storage means 33 DF and reads written guarantee information related to the article data. As a result, written guarantee information correspondence printing control means 11 and 12 makes the read written guarantee information correspond to the sales registered data related to the registered article on a receipt, and be closely printed. Therefore, even if the name of an article and the amount of money, etc., is not written and is not set, an exact written guarantee can be quickly issued.