A secure electronic settlement by an easy operation is enabled even with any terminal device and any network in any country. Balance information of a user, predetermined voice information that can identify a user, an arbitrary keyword, and a voiceprint are stored in advance in a database of a server in association with a telephone number of the user, and when a remitter user carries out remittance to a recipient user, the server sends out voice guidance including predetermined voice information registered in the database corresponding to the telephone number of a recipient terminal sent from the recipient terminal requesting the remittance or a telephone number of the recipient terminal inputted by the remitter carrying out the remittance to the recipient using a voice response function to a remitter terminal, thereby enabling intuitive confirmation of a recipient by a remitter.