I know an odd man who would send me mail with just a house number and street address. No city, state or zip, and it would arrive at my home OK.
Maybe thought you were Santa.
But usually they refuse to deliver at least in my experience.
Unless “or current occupant.” As for Dem mail in ballots to long deceased people at that old address.
Back in around 1971, my father got a letter addressed to him -—simply his name and the name of the County we lived in (population then around 20,000). I cannot imagine such a thing happening today. People don’t take pleasure in solving problems/figuring things out.