The OECD DAC Blended Finance Principles for Unlocking Commercial Finance for the SDGs aims to ensure that blended finance is deployed in the most effective way to address the financing needs for sustainable development as set out in the Addis Ababa Action Agenda (AAAA), by mobilising additional commercial capital and enhancing impact. The principles aim to distil and promote best practice and develop guidance that will assist the development co-operation community in delivering development impact from emerging blended finance principles, including the need for a measurable and verifiable demonstration on impact, particularly in poverty reduction.