I received a medical bill fromDesign Receivables Solutions Incorporated and Company, XXXX XXXX XXXX, XXXX XXXX XXXX , CA. 
This is after two years of my date of service an emergency room. I had received other bills concerning my treatment on the XX/XX/2013 which have all been settled by my insurance. 
Some bills arrived in the post more than XXXX time until they where resolved by insurance. 

Another debt collector service called me in 2013 to negotiate payment for a bill. 

This particular company kept silent about the fact that I still owed for two years and then sent me a bill after I changed my address. I called them and said I have insurance and I have sent my details. 

They responded that my insurance can not cover my bill because two years have elapsed. I replied that if I send my insurance details in answer to a bill and a creditor does not respond, I will assume that the bill has been settled by insurance. 

The collection agency has to response to the question- Why wait you wait two years to send a demand letter for a debt or send a follow up that you did not receive my response to your demand letteror send follow up letters continually demanding my debt to youror send a letter or phone call stating that you received my insurance details and my insurance does not cover the debt for the service offered. 

I searched XXXX, XXXX and XXXX company online and found out that this is their usual practice