Complaint Review: NCO Financial Systems Inc.

Received a letter from NCO stating that my account had been purchase from Chase Providian and that I owed $3948.76 and 10% interest for a total of $6917.34!
I of course never heard of Chase Providian and never had an account with them. I have a Chase credit card so I called them and they told me my credit score was perfect with them and do not owe them anything. I sent for credit reports from all three credit bureaus and receive perfect scores from them.

They apparently send these scam letters to mostly senior citizens and some of them probably send them money because they don't want to have their credit rating ruined. What a scam - Why are they allowed to stay in business?

Bill
Cape Coral, Florida
U.S.A.