This chapter discusses the rules and procedures governing evidence and burden of proof in WTO dispute settlement proceedings. The chapter explains that the WTO follows the normal rule that a party asserting a fact or claim bears the burden of establishing that fact or claim. The chapter discusses the types of evidence that may be submitted in WTO dispute settlement proceedings, including through the use of experts (particularly in cases involving SPS measures). The chapter examines the standard of review used in WTO dispute settlement proceedings. The chapter also discusses the special rules governing confidential information, including the rules governing so-called "business confidential information" and other categories of very sensitive information.