This is an actual conversation I had with at the Post Office today.

Official Behind Plexiglass: That’ll be $4.25

Me: Okay. Here ya go. Hey, while I’m here I have a question. What are the additional 4 digits on the zip code here?

Official Behind Plexiglass: Huh?

Me: You know. . .the 4 extra digits on the zip code? What is that here?

Official Behind Plexiglass: How should I know that?

Me: Okay, maybe I’ll ask someone who works at the Post Office.