Got a call from 970-292-6728. The man stated that his name was Gerald and that he was calling in regard to a 941 filing with PFG. Gerald stated that this was " a time sensitive matter" and that he needed my boss to contact him quickly. I asked Gerald if he was from the IRS. Gerald mumbled something into the phone and proceeded to talk quickly to divert my attention to another part of the conversation. I asked him two more times, the third very aggressivly if he was with the IRS. Gerald finally, stated to me that "NO, he was not with the IRS" Gerald proceeded to call a second time and yet a third time all in one day. I advised Gerald if he called again that I would take appropriate action with law enforcement for harassing communications.