*** This is not a duplicate *** I had written twice to XXXX XXXX on XXXX XXXX via certified mail USPS XXXX USPS XXXX concerning XXXX account by debt collectors XXXX XXXX XXXX account XXXX and XXXX Account XXXX. 

I had seek validation from XXXX through certified mail but did not received it. Tracking numbers are : XXXX/XXXX/XXXX USPS XXXX XXXX XXXX XXXX XXXX XXXX XXXX/XXXX/XXXX USPS XXXX XXXX XXXX XXXX XXXX XXXX Also XXXX XXXX/XXXX/XXXX - XXXX XXXX XXXX XXXX XXXX XXXX I did not get any response from either that this debt is valid. I escalated this to XXXX XXXX, sending them copies of the letters I mailed to the collector as well as proof of delivery, and they also did not respond. It has passed more than 30 days since I requested validation and have not received it.