In 2017, the Consultative Group of Experts on National Communications from Parties not included in Annex I to the Convention conducted two regional hands-on training workshops for Parties not included in Annex I to the Convention. The first workshop, for the African region, was held in Pretoria from 21 to 24 August, and the second, for the Asia-Pacific and Eastern European regions, was held in Siem Reap, Cambodia, from 4 to 7 September. The aim of these workshops was to facilitate the preparation and reporting of information on mitigation actions in the national communications (NCs) and biennial update reports (BURs) from these Parties, and to enhance the capacity of national experts in using the “Guidelines for the preparation of national communications from Parties not included in Annex I to the Convention” and the “UNFCCC biennial update reporting guidelines for Parties not included in Annex I to the Convention”. The workshop also served as a platform for a rich exchange of views, lessons learned and experience relating to the process and preparation of NCs and BURs, which was appreciated by the participants. The participants deemed the workshops useful in enhancing their knowledge on how to prepare and report information on mitigation actions in NCs and BURs. This report outlines the proceedings of the workshops and presents a summary of the discussions.