VISIT AUTHENTICATION SYSTEM

PROBLEM TO BE SOLVED: To provide a visit authentication system that authenticates a customer's visit to a shop.SOLUTION: The visit authentication system includes: an authentication information issue processing part that issues authentication information to a shop; a shop information storage part; an authentication process part that as to customer input authentication information passed on to the customer from the shop, receives an input from a portable terminal used by the customer, extracts information on a prescribed part from the customer input authentication information as authentication information, and executes an authentication process of a visit to the shop by determining whether the extracted information coincides with authentication information stored in the shop information storage part; and a point process part that, when the authentication can be normally performed in the customer information storage part and the authentication process part, extracts a part or all of point information in the customer input authentication information received from the portable terminal, and updates points of the customer stored in the customer information storage part on the basis of the extracted point information.