The Vanishing by Peter Duffie

You show two packets of cards. The packets are assembled underneath a handkerchief and one packet vanishes completely. You show the remaining cards SINGLY. The cards area really gone. Everyone thinks that the cards have been left under the handkerchief and under it a single card appears revealing a message (any message, 'BOO', 'GONE', etc..., even your telephone number!). This effect is easy and comes with the necessary cards. Any handkerchief can be used.