So I have a great idea, I think... but before I spend too much time trying to make it work I wanted to know if there is already a method to achieve the same results under the same conditions. I want to have the face of a card signed. The card must be 100% genuine and can be freely selected from the deck and can be completely examined. The signature can be across the card at any angle, in any direction and any size. The signature or markings made will not be known beforehand. The exact signature appears on the face of a different 100% genuine card which can be completely examined. So basically, no transparent card cover or anything. No attempt at discreetly copying the signature. Card can not be gimmicked in anyway. Like I said, I *think* I have an idea for how to do this, but before I start is there already anything out there that will meet my demands?