On Monday XXXX XXXX, 2015, Agent XXXX called my office, scared my staff and ask my assistant to deliver his urgent message that I need to call him back at XXXX regarding a very serious issue. I called back and the operator could not reach him. On Tuesday, XXXX XXXX, 2015, he used a different phone XXXX to call me on my cell phone number which was neither given to the operator nor him. He demanded me to pay the debt owed by a person and business who I do n't even know. He claimed that the debtor and I are living in the same address, and threatened to file a complaint to the Board to ruin my professional license. Even though I explained to him that I have no business or relationship with the debtor. He rudely said that he knew who I am and threatened to take legal action, then he hang up.