If you go to court because a law firm is suing on behalf of a collector, and it is for medical bills, do they still have to show where you originally signed for the medical services. Also if they show you were charged for a x-ray can you ask for proof, other then the bill from the hospital. Since people say up to 75% of medical bills are in error, do they need more then the itemized list from the medical provider? Thanks for your help.