Hand-delivering mail intended for my neighbors, that was mistakenly placed in my mailbox, is how I met most of my neighbors. The sloppy USPS is an important part of my social life.
USPS has a few times delivered items to our address which were intended for the recipient 1 block north with the same street number. It's how I've started to wonder if they might be Russian mafia all over there in their track suits.
For some reason, delivery drivers have huge problems finding my block of flats, and will often deliver stuff to the house with my flat number across the road, despite me putting in the delivery instructions that I live in the block of flats, not the house. I've occasionally had to go over and "steal" my own package back from outside their door and hope nobody calls the police on me