Junk debt collector. I am guessing this company employs criminal and illegal practices to scam people to paying things to prevent lawsuits. The must buy old debt or its data collected by hacking hoping to find suckers. The information that had for me was "mostly" correct including my SSN, but the debt was settled and paid in 1995!! (yes, 20 years ago). When I call them back to get them to stop calling, they threaten with a process server unless I am willing to make a payment today. This is a total scam. When I tell them they called a work number and that all inbound calls are recorded, they hang up immediately.
Don't fall for their scam, take the time to report to your local state trade commission.