Perhaps you will be surprised to see a tourist voucher in the game inventory, because we all know that people become defectors, because no one lets them leave the country.
However, this paper presence suggests that the person was allowed to travel abroad, and, moreover, this person plans returning. It instills peace in the border guards, and they are much more willing to let such people across the border.
Of course, if they had discovered that the voucher was no more than a skillfully crafted fake, signed by a weak-sighted old man and laminated so that the poor paper quality wouldn’t catch the eye, they would send defectors straight to the dungeon for the high treason and fleeing.
Well, it's a good thing that no one knows about it.