The Curtain Principle means that the current certificate of title contains all of the information about the title and it is not necessary for an interested person such as a potential buyer to worry about any past dealings with the property. This does away with the need to search back through the history of a property to be sure that the present owner is the valid owner of the present title. It is possible, however, if you are curious, to ask for a historical search if you want to know who owned the property in the past. Last updated: October 2015