To prevent an illicit transaction by making the own approval of the transaction by an officer impossible.
A server device 1 performs the user authentication of an approval requester who requests the approval of the transaction from a requester terminal device 2b (step S1), acquires the transaction content inputted from the requester terminal device 2b by the approval requester, the identification information used for the user authentication of the approval requester who inputs the transaction content, and the identification information of an approver for approving the transaction content, who is designated by the approval requester (step S2), compares whether the acquired identification information of the approver is matched to the identification information of the requester or not (step S3), and outputs the content of the transaction approval request to the approver terminal device 2a used by the approver when the identification information of the approver is not matched to the identification information of the requester (step S4). The approver checks the approval request content and transmits an approval permission information from the approver terminal device 2a to the server device 1. The server device 1 receives the approval permission information from the approver terminal 2a, and executes the transaction (step S5).
KOMORI MASANORI
SATO KENICHI
