Have you ever tried to find or research someone, perhaps someone who has sold you something, or an internet business person who has scammed you? There are various ways to try and track someone down, you can run a simple search engine search, this can be an easy way to locate them or their place of business, but if someone is experienced in online anonymity then this may not work. It is surprising just how many peoples info is recorded on public web pages and forums allowing anyone to try and track them down. However for those situations where the person is more skilled at hiding their identity, you need more detailed background checks as explained in this article: Free Reverse Lookup Websites - Do They Exist?.