I 've been receiving regular calls from XXXX. The name is not displayed on my caller ID, but it is a collection agency called Retrieval Masters. If I do not pick up I will get several calls a day. 

Upon speaking to the collector, I am told that I owe XXXX dollars to XXXX. The problem is that I am positive that I paid this debt last year. I have no proof, simply a very strong memory of doing so. I also do n't think that they have ever stated their company name. 

That said, memories can be wrong. I have asked, each time they 've called, for them to send me a letter detailing the amount owed, time of debt lapse, and all the other pertinent details. My first request was over a month ago ; I have received nothing in the mail and I know it is my right to ask for this information in writing. 

This last call from them, which happened today ( XXXX/XXXX/2015 ), I was threatened with a serious ding to my credit report. All of this combined is unacceptable behavior from a creditor in my mind. So I 'm filing this complaint.