This chapter talks about some of the most basic techniques for gathering and analysing information in a fraud investigation. One key in fraud investigations can be the identification of parties related to the person being investigated. Relationships which are kept secret are often undisclosed for special reasons. Depending on the type of case being investigated, surveillance of people can be a particularly effective way of gathering information. Surveillance in general means observing people, places, and movements. It is common to videotape almost all surveillance these days, but that is optional. Technology has changed the way fraud is committed, but it has also created paper trails that often make it easier to detect and investigate a fraud.