Headquarters of the United Nations themselves only, formally, at the request of the Secretary-General. Journalists, when reporting from the complex, often use "United Nations" rather than "New York City" as the identification of their location in recognition of the extraterritoriality status. The currency in use at the United Nations headquarters' businesses is the U.S. dollar. The UN's stamps are issued in denominations of the U.S. dollar. U.S. postal rates must be followed. The complex has a street address of United Nations Headquarters, New York, NY 10017, USA. For security reasons, all mail sent to this address is sterilized, so items that may be degraded can
Headquarters of the United Nations are a few organizations which regularly hold events at the UN. The United Nations Association of the United States of America (UNA-USA), a non-governmental organization, holds an annual "member's day" event in one of the conference rooms. Model United Nations conferences sponsored by UNA-USA, the National Collegiate Conference Association (NCCA/NMUN), and the International Model UN Association (IMUNA/NHSMUN) hold part of their sessions in the General Assembly chamber. Seton Hall University's Whitehead School of Diplomacy hosts its UN summer study program at the headquarters as well. Due to its role in international politics, the United Nations Headquarters is often featured in