I'm assuming this is legitimate, but it's so sad that I almost hope it's Rob (Cockerham)'s idea of a joke. From his website, cockeyed.com:
"This is sad, but I have to share it.
At the post office this morning, (mailing Cockeyed.com calendars)
A couple of delivery guys were chatting about a very sad handwritten note
one of them had found.
I had to get a look, and they were right."
To counter such sadness, check out the rest of
cockeyed.com. It's one of my favorite sites. The prank section is sure to make you laugh.