Election monitoring is the observation of an election by one or more independent parties, typically from another country or a non-governmental organization (NGO), primarily to assess the conduct of an election process on the basis of national legislation and international election standards. There are national and international election observers. Monitors do not directly prevent electoral fraud, but rather record and report such instances. Election observation increasingly looks at the entire electoral process over a longer period of time, rather than at election-day proceedings only. The legitimacy of an election can be affected by the criticism of monitors, provided that they are themselves seen as unbiased. A notable individual is often appointed honorary leader of a monitoring organization in an effort to enhance its own legitimacy.
The first monitored election was that of a 1857 plebiscite in Moldavia and Wallachia (current Romania) that was monitored by most of the major European powers. Election monitoring was uncommon until after World War II. Election observation activities have expanded significantly following the end of the Cold War, along with the development of international standards on the conduct of democratic elections and the process of monitoring elections by both international and domestic observing organizations.
In the 1990s, international election observation focused on elections in countries with weak democracies or democracies in transition. In recent years, however, there has been an increasing number of observer mission monitoring elections in long-standing democracies, including the United States, France, the United Kingdom and Switzerland.
International organizations such as the Organization of American States, the Organization for Security and Co-operation in Europe, the European Union, the Commonwealth Secretariat, the Council of Europe and the African Union regularly deploy monitoring teams. The United Nations no longer provides monitoring services, instead it focuses on electoral assistance. Individual governments also participate in monitoring efforts, generally under the umbrella of an international organization. These national efforts are normally managed by the local electoral commission. A wide array of NGOs also participate in monitoring efforts. The Carter Center, for example, played a key role — with the United Nations Electoral Assistance Division and the National Democratic Institute — in building consensus on a common set of international principles for election observation.