They called twice.  Did not leave message.

He states he is Agent Paul Brown or the IRS. He wants to serve you papers.  scam

I do NOT want to receive calls from this party

Posting that on this site isn't going to stop the calls.  Get caller id and don't answer, which won't stop the calls or answer, find out what's it's about and if it doesn't concern you, tell them not to call.  If they continue report them through the  Do Not Call registry.

DO NOT CALL complaints are a waste of time