Hey everyone,

I am looking for techniques/moves/gimmicks using which I can switch bills in performance without anyone knowing.
Basically switch an audience bill for one of mine without them noticing.

So far I only know of devices like blackdoor or boombox to accomplish this.
Would love to expand my knowledge into various ways I can accomplish this, and then choose the best one which suits my presentation or personality.

Thanks

Dollar Bill Switch, p. 216, Annemann's Practical Mental Effects. No gaffs are required and the handling is simple. It looks like the bill never left their sight.

Will definitely take a look. Thanks so much for your help Alan.

Agree with Alan, have used this many times for switching signed Bills etc... foolproof

You are using a bill and state that you are using either an envelope or a box. Can I assume the bill is folded at least in half? I would offer that with one more fold into fourths, a simple shuttle pass would be quite effective. The move has been used under fire to close many a card to impossible location routines(box mostly) so I think it could suffice in this case.