Three borrowed coins, three sealed envelopes.
A spectator secretly writes something/anything on a coin (a number, letter, ESP symbol etc.) This coin is then sealed in an envelope.
Another two or more coins are then sealed in separate envelopes, all of which are mixed by the spectator whilst the performer’s back is turned.
WITHOUT TOUCHING ANYTHING, the performer can not only locate the correct envelope, but also reveal what is written or drawn on the coin, before the envelope is