Patent ID: 7310611

Claim:
An order processing method executed by a computer operable for a shop, said order processing method comprising: receiving an order request including content information of a customer order from a customer terminal; registering the received content information of said customer order into an order storage device, and transmitting at least identification information of said customer order and shop information to said customer terminal or said settlement system as a settlement request, in order to make said settlement system carry out a check for a customer of said customer terminal in response to said settlement request received from said computer operable for said shop or said customer terminal, said check being carried out without any involvement of said computer operable for said shop; upon receiving said identification information of said customer order and a session key from said settlement system as a response to said settlement request, reading out said content information of said customer order from said order storage device relating to the received identification information of said customer order, and carrying out a stock confirmation processing of a commodity relating to said customer order, wherein said session key is data representing that said check for said customer of said customer terminal was successfully completed in said settlement system upon detecting, in said stock confirmation processing, that said commodity relating to said customer order is in stock, transmitting, as a request for a credit inquiry, said content information of said customer order that was read out from said order storage device, said session key to identify data stored in said settlement system, and shop authentication information to said settlement system; and upon receiving information indicating an acceptance of said customer order is possible from said settlement system as a response to said request for said credit inquiry, storing said information indicating an acceptance of the order for said customer order into said order storage device.