When I asked them to validate the debt and send any supporting documents for the services this bill was for. The debt collector could not provide details regarding the debt in question without violating HIPPA. When you are dealing with debt collectors you should only provide them with what little details you see on the debt in question as it shows on your credit report. Date of debt and account number listed on your credit report. I have also written a few other detailed articles highlighting how to correspond with debt collectors that you may find useful as well.