A card and associated system and method provides disposable but secure telephone debit cards. Identifying indicia are disposed on the telephone debit card surface, and temporarily covered so that it cannot be visually or photographically detected. After purchase of a debit card from a distribution terminal...http://www.google.ca/patents/US5504808?utm_source=gb-gplus-sharePatent US5504808 - Secured disposable debit card calling system and method
