English, French, and Spanish are the working languages of the Economic and Social Council (ECOSOC); and Arabic, Chinese, French, Russian, and issues stamps, which must be used on stamped mail sent from the building.
English, French, and Spanish are the working languages of the Economic and Social Council (ECOSOC); and Arabic, Chinese, French, Russian, and Spanish are working and official languages of the General Assembly. The United Nations Postal Administration issues stamps, which must be used on stamped mail sent from the building.