Send certified letter to the original creditor, must be certified mail. Get receipt after they receive it. You are sending them a letter demanding original contract of your debt proving the business you did with their company. Wait 30 days. After 30 days after no response take the proof of certified mail and copy of letter you sent demanding the original contract and send that now certified mail to each of 3 credit bureaus with an accompany letter explaining why you now need them to remove debt off your credit report due to non response and verification.