| abstract |
(57) [Summary] [Problem] A card capable of recording and issuing credit information of a user without fail, confirming card attributes and production lots even after issuance, and discriminating forgery of the card itself. And an issuing method using the same. A reversible display portion is formed in a pattern that can be optically identified when in a display state. A card having a rewritable reversible display portion that is transparent and invisible when in a non-display state, and an information recording portion, And, reading the pattern of the display state as identification information, confirming the matching between the information and the information recorded by the user, if matching, record the data of the user information on the card, erase the display pattern It is characterized by a card issuing method of making it invisible. |