Received a call from a representative, was told I had an XXXX backed credit card at XXXX XXXX between XX/XX/XXXX-XX/XX/XXXX - which is not true. I asked for proof of the debt and the person I was speaking with said to check my credit report, which I do frequently - there is no such listing on my report. They said they were going to serve me with papers and needed to verify my address. I asked again to discuss the history of debt and was hung up on. I called back and again was hung up. The phone number I dialed was XXXX