With 163 members, the Global Forum on Transparency and Exchange of Information for Tax Purposes is the leading international body working on the implementation of global transparency standards around the world. 

The Global Forum has 20 observers: 

• African Development Bank
• African Tax Administration Forum
• African Union Commission
• Asian Development Bank
• Caribbean Community
• Cercle de Réflexion et d'Échange des Dirigeants des Administrations Fiscales
• Commonwealth Secretariat
• Council of Europe Development Bank 
• European Bank for Reconstruction and Development
• European Investment Bank
• Financial Action Task Force
• Inter-American Center of Tax Administrations
• Inter-American Development Bank
• International Finance Corporation
• International Monetary Fund
• Intra-European Organisation of Tax Administrations
• United Nations
• West African Tax Administration Forum
• World Bank Group
• World Customs Organisation