PURPOSE: An internet approval system is provided to prevent illegal card use caused by exposure of a card number and a secret number by inputting an approval key transmitted from an approval server through an e-mail address. CONSTITUTION: The system comprises an internet terminal(2), an internet server(6), and an approval server(10) of a financial agency. The internet terminal(2) is connected to internet. An internet home page(4) is loaded to the internet server(6). The approval server(10) is connected to the internet server and has database(8) in which e-mail addresses of clients are recorded.
