The aim of this paper is to provide key lessons learned and best practices in identifying potential policy approaches under Article 6 of the Paris Agreement. Scarcity of theory and experience in this field required GGGI to develop its own methodology and processes to assess policy approaches aligned with countries’ NDCs and climate change strategies. The paper explores the strengths and limitations of a theoretical/ academic analysis and addresses key challenges in developing practical policy approaches that can generate tradable mitigation outcomes. It also emphasizes the key role that GGGI’s embeddedness played in scoping potential policy approaches within the countries.