I received a government letter to somebody else at my address. The mail person even put a question mark on the envelope as she guessed that person doesn't live at my address. I put the envelope back in the mailbox after I wrote "does not live here."

I'm first owner of this home so I don't have the situation the OP describes.

However, my neighborhood has 2 different postal carriers covering this route and the days the older one delivers I'm likely to receive at least one piece of someone else's mail. I could understand stuff sticking together and it being for a neighbor, but sometimes it's for someone miles away. I personally deliver it if it's one of the 4 blocks in my little subdivision, but if it's for someone else I mark it up and put it in the outgoing mail.

USPS is also pretty bad about putting someone else's package on my doorstep. Once again, I deliver if it's in my subdivision but it's too large to fit in outgoing mail so a couple time I've hopped in my truck and delivered.

When I lived in Can-eh-duh, FedEx routinely delivered stuff to the dyslexic version of my address and vice versa. When I received one for my neighbor, I quickly delivered it rain, snow, or shine. It had nothing to do with her being an absolute babe who seemingly only wore yoga clothes.