There is also some experience in collective estimation of climate finance in the UNFCCC context. In particular, the OECD (2015a) developed the first estimate of mobilised climate finance — which also entailed developing a methodology to ensure the avoidance of double-counting, as well as of attributing climate finance mobilised multilaterally to developed countries. To accommodate different ways and types of providing finance, these reporting formats could encourage Parties to provide more contextual explanations. Reporting on climate finance provided to developing countries by other developing countries would help to increase recognition of this increasingly significant source of climate finance.