A Note from Benito Müller in response to CDKN’s Working Paper on Supporting international climate negotiators: Lessons from CDKN. The paper includes CDKN’s theoretical approach to ‘amplifying the voices of the poorest and most climate-vulnerable countries’; yet at the same time reveals some tensions between what practice requires and what funding rules permit. This Note discusses some of these tensions based on lessons learned providing support to international climate change negotiators.