If you want a truly funny joke, at least to me, here is one. And this really is true.
Whenever a letter is returned unopened to the post office it requires an official 'return to sender' endorsement which is supposed to give the reason for return. Options available are refused, moved address unknown, deceased, forwarding expired, and no such address.
Several times per week, for a couple of years, we were at a loss as to how to endorse it when mail for patients was returned to us by the local hospital. The reason for that was a wit in their mailroom was sending it back to us with inked comments like "checked out, no longer with us, moved on, gone to a better place".