Debt collection agency hired by XXXX XXXX XXXX for services rendered on XX/XX/XXXX. I called XXXX and requested a copy of the itemized bill in XXXX and did not receive it. I did not get a call, or any additional information until XX/XX/XXXX from Optimum Outcomes XXXX XXXX XXXX, Set XXXX XXXX, NC XXXX XXXX Collection Agency. I then called our XXXX XXXX who sent over the samples to be tested, and they stated that XXXX claims they sent the itemized bill. My concern is how does this agency not validate a debt before posting on our credit report as required by the F.D.C.P.A. The bill has been paid in full, on XX/XX/XXXX, the damage the credit report was done, and they do not want to take any responsibility for not following up on our request for itemized bill.