Abstract: This invention is related to a discernment card which is resistant to bending and high heat, and capable of preventing unauthorized copying of recorded identity information leakage of personal information and deletion of identity information, and to a discernment card business system for preventing unauthorized use of identity information. The discernment card (1) comprises a card main body (10) integrally formed by a high strength alloy and at least one identity information recording portion (20) comprising specific identity information inscribed on the card main body, wherein plural cells (30) are inscribed at predetermined positions of identity information recording portion of the card main body and specific identity information of the identity information recording portion is specified by one or more of inscribed depth, inscribed width and inscribed shape of the cells.