Leave it to Germany’s Magiro to come up with a fully automatic version of a “Three Shell” type effect.
A banknote (most currencies incl. EURO, US-Dollar will work) is folded in a small packet and secured with a pin. Three covers are introduced and the note is hidden under one of them. The audience is supposed to keep track of it. of course they never find the note.
Typical Magiro method. Easy to do and clever.