"The poorest and most climate vulnerable countries have the most to lose from climate change, but are often unable to fully represent their interests in international climate negotiations. Since July 2011, CDKN’s Negotiations Support programme has been providing legal and technical support to negotiators from these countries. Funded by the Climate Window of the UK Department for International Development’s Advocacy Fund, its aim is to support positive changes in the influence that the poorest and most climate vulnerable countries have in securing an international climate change deal, in 2015 and beyond. This Working Paper describes how CDKN has developed a tailored system for monitoring and evaluating the Negotiations Support programme, using an adapted outcome mapping approach alongside a logical framework (logframe). It also outlines some early lessons from using this approach. We hope that this will be of interest to donors and practitioners who provide support to international negotiators, as well as others involved in both international negotiations and monitoring and evaluation."