This is one of Ben Harris's favorite effects. Released in 1987, it featured heavily in his lectures across the '87-89 period and was a total sell-out at the major magic conventions, or whenever demonstrated.
In effect, a small envelope is shown, signed on BOTH sides by a spectator, and then left IN FULL VIEW upon the table. A card is now FREELY selected from the deck, and also signed. The spectator pushes his card squarely into the deck and then counts the cards. Mysteriously, his card has vanished. There are now just 51 cards in the deck.

The envelope, which has been in FULL VIEW the entire time, is now opened with EMPTY HANDS and the signed card removed from within.

This is a stunning and clever method. NO PALMING and the card is GENUINELY inside the envelope. And remember, this is a signed envelope! Do not confuse this with a popular effect called "Consignment." Solid Gold Easy Action predates this by over 20 years and requires NO PALMING.