Assisting in Bill Split Payment

When a split amount decided by a representative splitting, in a representative terminal, a total amount transmitted from a store terminal is notified from each member terminal to a credit company server as a payment amount, the credit company server holds information for payment settlement, and transmits payment permission information including encrypted information generated by encrypting the information for payment settlement, to each member terminal. Each member terminal transmits payment permission information of the same contents as the payment permission information to the representative terminal. The representative terminal transmits payment permission information obtained by concatenating the payment permission information, to the store terminal.