787
Reasonable response rule
(slrpnk.net)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
It's not legal anymore but that doesn't mean you'll get caught
You're an idiot if you don't think the USPS doesn't has the capability to figure out who's doing it if they care.
That's a hell of a double negative you didn't not write 😛
You're a downright big dang old dumb idiot if ya darned done don't not be thinkin they dont unhave not the ability to not had that capacity.
I see.
Source on the legality change? I’ve never heard about a law that would apply to this.
So I have been unable to quickly confirm this on the post office directly, but the commonly cited rule online is quoted as 917.243(b).
If we can believe the multiple sources and the rule hasn't been changed, I recalled it a little incorrectly. Using such a letter as a label is legal but if they deem it an improper usage, like directly mailing a brick with the letter taped to it, they reserve the right to just dispose of it. No trouble for the sender though, so it can't hurt.