This document provides information on deposition officers, private investigators, and process servers. It summarizes that deposition officers must follow certain sections of the California Code of Civil Procedure and there are timeframes set by law. Private investigators are guided by the Private Investigator Act and certain Model Rules and Penal Code sections. Process servers must be at least 18 years old, not a party to the action, and in most cases must register with the county clerk under the Business and Professions Code. The document also provides some case law examples regarding investigation and process service ethics.