This study is part of Peru’s Initiative on Promoting Transparency of Technical Barriers to Trade World Trade Organization Notifications: Improving Completeness and Clearness of Information. It aims to evaluate the completeness and clearness of the information provided by APEC members in accordance with the WTO TBT Enquiry Point Guide: Making Transparency Work (2018) and Decisions and Recommendations adopted by the WTO TBT Committee (G/TBT/1/Rev.14). The scope of this study includes a representative sample of regular and emergency notifications, and their respective addenda and corrigenda; submitted by APEC economies between 2015 and 2019. It also includes a questionnaire to evaluate private sector experiences on the matter. Results show that there is an acceptable level of compatibility by APEC economies with WTO recommendations; however, there is room for improvement regarding the information submitted by APEC economies in specific items in the TBT notifications.