Okay. Thanks.
In the rare cases where I use stamps at all, I tend to purposely over-stamp so my mail won’t boomerang back to me.
Nothing worse than the recipient getting their birthday or anniversary card long after the fact.
...or with postage due!
I once had a package arrive with postage due because a vendor used a free priority mail box and put 1st class postage on it. What a great way to lose customers!