u/Eastern-Pop3957

I work in a very rural office that consists of 2 carriers and a clerk. Lately the clerk has been butting into me and my other carriers conversation when we are talking (ex only putting in one box holder a day) and claims that he thinks it’s incorrect and he will “look it up”. Yesterday he decided to call our supervisor and have him explain that it doesn’t matter and what not. Is there anything I can do besides telling him to stop and this isn’t any of his business what we are talking about? This has been going on for months now and I’m exhausted.