These people are bottom feeders. They purchase bulk debt. Firstly, they are not authorized to collect debt in many states as they do not have the proper licenses. And secondly, in many states, the law indicates that you should be presented with the original invoice with your signature which they don not have because of bulk buying records. If they are harassing you, you should call your consumer affairs complaint and an attorney to protect your self from these scumbags. They are bullies. Do not allow these people to bully you. Stand up for yourself and demand to see the original debt. Look up your state consumer debt laws before speaking to these disrespectful racist bullies.