The apartment I'm living in now has an apartment number like this M1-4, If they forget the dash or put a space or do anything else I won't get the mail.
And my address is on Street Road. This is commonly mistyped, but I encountered one computer system that couldn't take it because it insisted on trying to correct it.
Between people mistyping and computer refusing to accept or trying to correct it, I have had a steady stream of problems with my mail since moving in.
Jay