These are the highlights from the ICC and RTCC roundtable in Cancun, 2010. Climate finance is a critical consideration in the negotiation of a post 2012 international framework agreement on climate change. At the 2009 U.N. Climate Change Conference in Copenhagen, several governments committed to mobilisation of $100 billion a year for climate finance by 2020. In addition, governments agreed to deploy US$30 billion in ‘fast start’ financing over 2010-2012 for vulnerable developing countries.  Such estimates of the large sums necessary make clear the need to establish trust, institute effective governance, and pursue  win-win propositions for both donors and recipients of finance, if such large flows are to sustainable.