Just got a call from these people. They are Credence Resource Management and a collection agency. Called back on a different phone line and a woman with a strong Indian accent said she could not give out information about their business unless I gave her the number that was called. When I pressed for more information she said that their business is personal and private and she could not tell me who they are without the phone number. Looked up the number on the internet to get the name. Since we have no outstanding debt, I suspect this is some type of phishing scam to collect on bogus debts.