Patent ID: 8131856

Claim:
A communication system for transmitting and receiving customer registration information, comprising: a first communication apparatus configured to store customer registration information having a first format previously registered by a user in order to receive a first service, and to generate an information registration screen on which user registration of the customer registration information having the first format is performed; a second communication apparatus configured to store customer registration information having a second format different from the first format registered by the user in order to receive a second service, and to serve as an authentication server for single sign-on authentication; and a third communication apparatus that includes: a transmission unit configured to transmit a request for registration with the first communication apparatus to the first communication apparatus; a reception unit configured to receive the information registration screen from the first communication apparatus according to the request; and a display unit configured to display the information registration screen from the first communication apparatus, wherein the first communication apparatus and the second communication apparatus are configured to update and share the customer registration information at regular periodic intervals, the information registration screen generated by the first communication apparatus includes an option to select whether the information registration screen is to be populated by the customer registration information in the second communication apparatus, upon selecting the option to populate the information registration screen, the transmission unit is configured to transmit a request for customer registration information to the second communication apparatus, and upon receiving the customer registration information from the second communication apparatus, the display unit is configured to display a first screen including the information registration screen and a second screen displaying the received customer registration information from the second communication apparatus.