The Invisible Signature by Christian Scherer

Apocalypse by Harry Lorayne
Volume 6, Number 1 January 1983
Page 728 et seq.

Personal Comment: Kind of a throw away routine in my mind. But it is a nice way to get rid of a dupe in a deck of cards. Here is what could have made it better: Instead of the signature just reappearing on the face it could have gone on, with the signature also vanishing from the back of the card. Then both would come back. Same amount of work twice the effect.

Difficulty 2/5