Original Debt Collector XXXX XXXX XXXX signed a note with us for a reduced debt to be collected with the promise we pay back this debt monthly with no interest ( $ XXXX ). We 've paid this debt continually and on time for 3 yrs. until they sold the debt to Specialized Loan Servicing LLC ( SLS ). SLS claims they did not receive any paperwork of the reduced debt and are now trying to collect the whole sum. I 've sent them the note ( notarized ), I 've sent all my bank statements as proof of uninterrupted payments. THEY still do not believe me. I 'm exhausted with 7 months of this go around. They state XXXX will not communicate the debt to them. We are stuck in the middle. It is not our problem that XXXX sold them a debt that they did not confirm.