Is CCS / warningnotice.com a scam?

I received a collections notice for a company that I haven't done business with in over two years. I do not owe the company (an insurance company) money, and they have not once contacted me with bills since I closed my account with them, though I am certain that they have my present mailing address. Could this be a genuine error or is it some kind of scam? Do they have any bearing on my credit report? I'm not just going to pay them whatever they want to protect my credit score even though I don't owe anybody. Help.