On the front wall sticker
On the front wall sticker
On the front wall sticker of the envelope stick one plain white address label at about center of the envelope. Stick another plain white address label at the top left corner of the envelope for your return address (see photo b). And that’s it. You’re done!To seal the envelope after you have inserted your letter you could use tape or even a sticker. If you have a wax stamp that would work also. Place your stamp on it as you normally would and mail it off to one lucky recipient.