1. A method of storing information that enables tracking of physical locations of paper documents, the method comprising: generating a paper document using a paper document output device, wherein an identification tag is physically associated with the paper document; determining identification information stored by the identification tag, wherein the identification information determined from the identification tag is used to identify the paper document; storing the identification information; and storing physical location information identifying a physical location of the paper document such that the physical location information is associated with the stored identification information.