After reviewing my credit report over a month ago, I notice an unknown debt of {$200.00} from XXXX XXXX that was opened in XXXX XXXX. I have written to the collection agency called Enhanced Recovery Co to ask for a debt validation. They never responded to my certified letter ( with return proof of delivery ). After several research, I pulled up a previous credit Report made in XXXX and noticed that another Credit Collection Agency called XXXX had put a similar XXXX XXXX XXXX balance/debt of {$200.00}, opened this time, in XXXX XXXX. The last time I used XXXX XXXX XXXX was in XXXX. I have every reason to believe that the Enhanced Recovery Co is negatively re-Aging my debt. I read from several sources that this technique was illegal. I also signed up a week ago to credit Karma to see updated info on my record and noticed that around XXXX XXXX ENHANCED RECOVERY CO put a note stating that I have filed a complaint that was resolved but they seem to have removed this note a few days later.