Sealed³ by Axel Hecklau

Sealed³ – The three sealed Envelopes – Starter-Pack
This is not a single trick, but a flexible tool to give a routine an extremely amazing finish.
e.g. as an absolute kicker for the ambitious card.

E-mail by Teller:

There could not be a more beautiful and impenetrable way to make an object appear in a nest of envelopes.  
The spectator gets to take away an impossible object that drives home the miracle.  Perfection.

And you may quote me.
 
Here a "no palm" performance: 
 
A signed card disappears from the deck.
A sealed envelope is retrieved from the pocket and quickly and elegantly opened with the aid of a tear strip. A second envelope, also tightly closed and sealed, is revealed inside.

The spectator examines this envelope and then opens it himself.

He finds another sealed envelope (which can of course be examined), but he does not have to open it to experience the miracle. 
It is a window envelope in which he can clearly see his signed card.
A wonderful, long-lasting and magical souvenir.

Another flat object can also be used for the performance: e.g. a credit card/ID card, banknote, coin or even a ring.
Sealed³ should also be very interesting for mentalists: Think about predictions!

The preparation is quick and uncomplicated. No drying times or smudged fingers. You can prepare Sealed³ just 5 minutes before the show or 6 months in advance.

When table hopping, Sealed³ can be performed immediately at the next table without a reset. Your pocket only needs to be refilled after 5-6 performances.
It is not absolutely necessary to wear a jacket. Jeans and a T-shirt are also possible, as is the use of a ladies' handbag.