They are called Nationl Credit Works, Inc. Debt collectors of purchased accounts. Be careful about sending them any money, he does not have any docs to back up his claims, nor is he licensed or bonded anywhere.

http://800notes.com/Phone.aspx/1-866-618-5731
http://800notes.com/Phone.aspx/1-866-304-7249
http://800notes.com/Phone.aspx/1-716-684-8183