Mystery Card Location
Have the cards freely shuffled - take back the cards.
Whilst explaining the delicate and difficult nature of the trick you are about to perform secretly note the bottom card.
Now fan the cards slowly between your hands, after fifteen or so have passed, ask your chosen helper to touch one of the cards.
Push the touched card forward and offer it to your helper for them to take and note(and show around). As they take the card, undercut the bottom half of
the deck. Offer the top half of the deck for them to return their card, now place the bottom half of the deck on top.
Square up the deck and place it on the table (or flat of your hand) and ask your helper to make three complete cuts of the cards.
Pick up the cards and ribbon spread them face-up on your table.
All you have to do now is locate the bottom card that you 'peeked' and the chosen card will be the one above it.
With as much mystery as possible - reveal their card !!!
Note : Should the 'peeked' card be the top face-up card, then the chosen card will be the bottom face-up card.