I have recently pulled out my credit profile from equifax company. I have found out XXXX account that is incorrect, that is reported from Collection agency. After sending letters to the Collection Agency who has listed an item on my file, to ask them validate my debt. But I have n't received any legal documents that proof of debt, such as acoount statement, name of original creditor, and registered agent number, and so on. I asked them to delete from my credit file if they ca n't validate my debt, But they still keep reporting to credit report company while they ca n't validate my debt. 
I have contacted the credit report company, Experian, to ask them to investigate the account that I was given no evidence of my obligation to pay this debt to this collection agency. But it came out verified from Experian ( attachment enclosed ). And as I know this debt is out of Statute of Limitations of State, but the Experian still allows debt collector to report in my credit file. Please help me to resolve this matter. It affects my life, and make me distressful. 
Thank you so muchSincerely Yours, XXXX XXXX