Received 5 calls in 10 minutes from this number. The "gentleman" would not give me his name but proceeded to threaten me using an incredibly rude an condescending tone. I politely told him I was at work and unable to speak at the moment. He was persistent so I finally told him I was not verifying any information and obviously not sending any money. The threats and rudeness escalated even more. I would really like to know how they get away with this.  I have successfully sued collection agencies in the past and believe I will pursue this one as well.