To solve a problem that large mail costs are required for mailing a prepaid card to each of clients or mail is frequently returned because of unidentified recipient, costs are wasted and following processing is complicated as well.

In the case of transferring a browser phone utilization right prepaid card with password number E issued by a telephone communication company, when there is access from a browser phone B to a web address D, after a web page for confirming an ID/password (a) is delivered to the browser phone B and authenticated, the transfer of the utilization right of the password number E is reported, a web page explaining a method for registering the password number into the telephone communication company is delivered to the browser phone B and the password number E is handled as transferred one. When there is no access from the browser phone B to the web address D even after the lapse of a prescribed period, the password number E is returned to a transferable password number list and the planned transfer of the utilization right to a planned person A is canceled.