Jav, they are required by law to send you proof of the debt (and their right to collect it!) IN WRITING. By mail -- not fax, email, etc. Until they do that you should ignore them (read the posts above yours). If they persist in harassing you without providing written debt validation you should file a complaint against them. See this link: http://800notes.com/arts/Jb8EW-eDhQA/harassin ... ou-need-to-know