Multi-Donor Trust Funds (MDTFs) have become an important funding mechanism to channel and leverage resources in an effective and coordinated way in support of UN system-wide development efforts. The increasing use of MDTFs is a direct application of the aid effectiveness agenda and UN reform initiatives in support of nationally determined and led development programmes. The principles of national ownership and leadership are key principles of the Paris Declaration on Aid Effectiveness, reconfirmed in the Accra Agenda, and have been central to the UN operational activities for development.