PURPOSE: A system for certifying an autographed document or a product using SMS is provided to check a real document or a product from a false. CONSTITUTION: An authentication request receiving device(24) receives an authentication request including an authentication number in a document or a product. A user inquiry device(25) inquires a user's mobile phone number with the authentication number. If the inquiry of the mobile phone number of the user is succeeded, a generic number generating device(26) generates a generic number corresponding to authentication request instance of the user, and store the number to a DB. A generic number providing apparatus(27) transmits the generic number to the inquired mobile phone number.
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