In this episode, we explore certification and collective marks, specialized forms of trademarks that play unique roles in the market, as discussed in The Cambridge Handbook of International and Comparative Trademark Law. Certification marks indicate that a product or service meets specific standards, such as quality or origin, while collective marks denote membership in a specific group or association, often highlighting shared geographical or trade origins. We discuss the legal requirements, registration processes, and enforcement mechanisms for these marks across jurisdictions, with particular attention to the practices in the United States, European Union, and other global systems. This episode examines how certification and collective marks contribute to consumer trust, fair competition, and the protection of regional or trade-specific identities in the global marketplace.