Fresh Mint 2.0 by Cameron Francis - DVD by David Forrest
You display a small tin, wrapped in a rubber band, bearing the words 'TIME CAPSULE' - this is left in full view. A spectator signs their own bill (any currency) and hands it to you. Placing it inside your fist you give it a little squeeze and incredibly, the bill completely vanishes! Or did it? You go on to explain that you actually sent the bill back in time! The tin is opened and inside is discovered a 'Tic-Tac' box through which can clearly be seen a folded bill! The 'Tic-Tac' box is dumped into your hand. You pop the lid off and cleanly dump the bill into your spectators awaiting hand - the box is now clearly empty. They unfold the bill and sure enough, it bears their signature!