I discovered an unknown medical account dating back from XX/XX/XXXX on my XXXX credit report so I filed a proper dispute with XXXX by way of certified mail as they are the only credit reporting agency that is reporting this unknown medical account. The certified letter was sent on XX/XX/XXXX XXXX received it on XX/XX/XXXX and I received their response on XX/XX/XXXX XXXX said that Illinois Collection Service Inc. had verified the account and if I had any other questions concerning the account I should contact the collection agency. I sent Illinois Collection Service Inc. a letter by certified mail on XX/XX/XXXX which they received on XX/XX/XXXX asking them for validation of the account but I have never heard anything back from them. I sent another dispute letter certified mail to XXXX on XX/XX/XXXX stating that Illinois Collection Service Inc. had not responded to my validation request and has provided no verification of any kind for this account. I also included in the second dispute letter to Experian a copy of the letter I sent Illinois Collection Service Inc. and proof of their having received it. The second dispute letter sent to XXXX asked that the aforementioned unknown medical account be removed from my credit report due to Illinois Collection Service Inc. 's failure to provide any validation of the account what so ever, this letter was received by them on XX/XX/XXXX. I then checked my XXXX credit report on Friday XX/XX/XXXX and discovered that this unknown medical account was still reporting with these new statements included, " Reinvestigation information this item remained unchanged from our processing of your dispute in XX/XX/XXXX '', and this " Collection as of XX/XX/XXXX ''. Illinois Collection Service has not only continued to report this unknown medical account even after my request for verification, validation and their refusal to to supply any information at all to validate this account but they have evened updated the account to XXXX of this year.