This chapter covers certification and collective marks and their combined use with trademarks and service marks. Trademarks and service marks indicate the individual commercial origin of the products and that all products identified by a specific mark share the same quality. On the other hand, certification marks identify products with specific pre-set standards that typically include product quality and safety, labour and environmental practices, and, geographical origin. The chapter also defines collective marks as trademarks or service marks owned collectively by a group either to identify their products or to indicate collective membership to a club or association. It then elaborates on the role the US and EU trademark systems have had on the development of trademark laws worldwide.