In XXXX 2015 I received a call from a blocked phone number that said I needed to call XXXX regarding legal papers they needed to serve. I called that number, they did not identify themselves, did not state was for a debt collection and gave vague information regarding a debt I owed. When I asked further they gave me a non existent account number and customer service phone number for XXXX XXXX. I called XXXX XXXX and they had nothing on file for that account. I called back to the XXXX number to get further info and was told I could pay {$400.00} of the total of {$600.00} to make it all go away. I said no and I needed proof of the debt in writing. They said they would mail it out, never did. I sent a certified demand letter which came back to me today as undeliverable. The company is XXXX XXXX XXXX XXXX who is also now on my credit report, that is the address I used to mail the demand letter. I have not heard anything further from them to date. I do not have an outstanding bill and will not pay anything on an account that does not exist. 
