This article offers an examination of the development and operation of accountability mechanisms in multilateral development banks. These mechanisms are gateways for citizens, as non-state actors, to file their grievances in projects that adversely affect them against these international organisations at the international level. The study focuses on the accountability mechanisms established at the World Bank (International Bank for Reconstruction and Development and International Development Association) and the Asian Development Bank, and other initiatives and avenues provided by these institutions addressing accountability issues. The article offers an analysis of barriers encountered by claimants in accessing these mechanisms based on insights generated by way of claims filed and participation in accountability procedures. It suggests ways in which civil society's demands for accountability in multilateral development banks and other financial institutions can move forward.