(The office where I work is fairly small, which results in me overhearing the receptionists’ half of the phone conversations with some of our clients.)

Coworker: “[Office's name], how can I help you?”

(The client talks, coworker answers the usual questions.)

Coworker: “Ma’am, I understand that but we can’t open your mail to check it for you.”

(The client continues talking.)

Coworker: “Yes, but as I said earlier, we can’t open your mail to check. It’s best that you get a P.O. box.”

(The client is talking again and is apparently upset, as the coworker has a frustrated/annoyed look on her face.)

Coworker: “Ma’am, you’ve called us many times in the past before, and we’ve said it many times before. We really recommend you to get a P.O. box, because we legally can not open your mail to check.”

(Eventually, the client hangs up.)

Me: “Not the first time?”

Coworker: “Won’t be the last.”