Thus, these different estimates make it challenging to establish an aggregate overview of climate finance provided and mobilised in the UNFCCC context. However in order to enable and enhance clarity and transparency in reporting on climate finance flows, support and effect thereof it is important to encourage information sharing from a relevant and verified sources, including those outside the UNFCCC context. For systems still under development (e.g. TOSSD), it is too soon to assess whether they will be able to identify “climate” finance, or finance that has been mobilised by developed countries.