Previous CCXG work (e.g. Ellis, Caruso and Ockenden, 2013) has highlighted that this is because (i) aggregation and attribution of financial flows to developing countries requires information on outflows from various multilateral climate funds and development banks, and (ii) reporting requirements do not require all the relevant information. Aggregation will also be difficult for information from other Parties providing support, some of whom may have their own tracking and reporting practices. Like for mitigation, external sources of information and analysis, beyond those provided by Parties under the enhanced transparency framework of the Paris Agreement, could inform the global stocktake.