That is rather amazing. There was one case I remember reading about 15-20 years ago where someone in the UK dropped a letter into a mailbox with just a name, s

That is rather amazing. There was one case I remember reading about 15-20 years ago where someone in the UK dropped a letter into a mailbox with just a name, street number (IIRC), and street and it managed to get to the recipient in Pennsylvania, US. Someone from the post office guessed that a bunch of misreadings happened to get it close enough. I guess a creepy possibility is if they have a database of every letter sent they can search that to often figure out the likely recipient (at least in the case I am thinking about where they were in regular contact).