On XXXX XXXX I received a letter from American Medical Collection Agency ( AMCA ) regarding a debt with XXXX XXXX. We sent them notice disputing the debt, stating " I 'm writing in dispute of this account PIN XXXX, please validate this account and send proof of validation, including proof that your client has billed the proper insurance company that it was provided at the time of service and not an insurance company for which it was not provided information for. " On XXXX XXXX we received a letter stating they had received our notice, and still continued to pursue the debt without ever having verified it. 

They have since sent XXXX letters demanding payment for a debt we do not owe and have refused to verify the debt, because if they did they would see the debt has a {$0.00} balance with the XXXX XXXX. 

On XXXX XXXX, XXXX XXXX representative XXXX XXXX said she had contacted AMCA to inform them that they had failed to properly bill the Insurance Company and that due to a glitch in their systems they had failed to bill and would alert AMCA. 

Their latest letter on XXXX XXXX states that we have neither paid the invoice or disputed the validity of the debt, which we did on XXXX XXXX, 2015 and they acknowledged this in their letter sent XX/XX/XXXX. 

We look forward to you helping us resolve this debt collector continuing to violate the Fair Debt Collection Practices Act.