Enhanced recovery company LLC sent me a mail regarding a debt that I owe from XXXX. I mailed a letter back ( USPS confirmation delivery : XXXX. ) Requesting information about their business, a copy of the last bill, their license, etc. They have not responded back to me. They have reported this debt to the credit bureaus. Nobody is giving me information yet they are expecting me to pay without being informed or them identifying themselves. For all that I know it can be a scam! I am still a XXXX customer and I still have the same phone number. It is astonishing that enhanced recovery company was able to reach me at the same address yet t mobile was n't even able to reach me or call me to explain the situation. XXXX effort to contact me was none at all. How am I suppose to pay a bill if I do not see the bill? 
Note : I have already phone in to make a claim. Please attach this to existing claim. case # XXXX and # XXXX. 
Note : Please see attached supporting document. It is dated!!