A communication system includes a communication terminal wirelessly communicating with a predetermined base station and a server capable of transferring data through the wireless communication with the communication terminal. The communication terminal includes a payment settlement processing unit capable of carrying out payment settlement processing, a record memory unit configured to store a record of the payment settlement processing carried out at the payment settlement processing unit, a display unit configured to display record data stored in the record memory unit, and a control unit configured to transfer the record stored in the record memory unit to the server. The server includes a storage unit configured to store the record data transferred from the communication terminal, and a record disclosure processing unit configured to transfer the record data stored in the storage unit to other communication terminals within a predetermined range.