Research about somone who is selling Internet marketing products can be easy, simply because of the way the internet works. The simplest thing to do is to run a simple google search which may give you some information with little effort. When others have had good or bad experiences with the product they might have made comments and reviews online. When you wan to find put more about the person who sells the product, for example someone you jave never heard of before and who has no comments abut them online, you can in theory find personal information such as criminal records or if identity check info using a background check or free reverse lookup.