A landing card is a form that non-EEA

European Economic Area

The European Economic Area was established on 1 January 1994 following an agreement between the member states of the European Free Trade Association and the European Community, later the European Union . Specifically, it allows Iceland, Liechtenstein and Norway to participate in the EU's Internal...

 citizens are required to complete on entry to the United Kingdom

United Kingdom

The United Kingdom of Great Britain and Northern IrelandIn the United Kingdom and Dependencies, other languages have been officially recognised as legitimate autochthonous languages under the European Charter for Regional or Minority Languages...

 or the Republic of Ireland

Republic of Ireland

Ireland , described as the Republic of Ireland , is a sovereign state in Europe occupying approximately five-sixths of the island of the same name. Its capital is Dublin. Ireland, which had a population of 4.58 million in 2011, is a constitutional republic governed as a parliamentary democracy,...

. The traveller must present the completed form at the immigration desk at the point of entry. The form is usually supplied by the airline, train or ferry company.

In the UK, the landing card system is governed by the Immigration Act 1971

Immigration Act 1971

The Immigration Act 1971 is an Act of the Parliament of the United Kingdom concerning immigration.The Act, as with the Commonwealth Immigrants Act 1962, and that of 1968, restricted immigration, especially primary immigration into the UK....

, schedule 2 paragraph 5, which states;
The Secretary of State

Secretary of State for Foreign and Commonwealth Affairs

The Secretary of State for Foreign and Commonwealth Affairs, commonly referred to as the Foreign Secretary, is a senior member of Her Majesty's Government heading the Foreign and Commonwealth Office and regarded as one of the Great Offices of State...

 decides, by issuing a Statutory Instrument

Statutory Instrument

A Statutory Instrument is the principal form in which delegated or secondary legislation is made in Great Britain.Statutory Instruments are governed by the Statutory Instruments Act 1946. They replaced Statutory Rules and Orders, made under the Rules Publication Act 1893, in 1948.Most delegated...

, which nationalities must complete a landing card. Currently all EU nationals, and those from Iceland

Iceland

Iceland , described as the Republic of Iceland, is a Nordic and European island country in the North Atlantic Ocean, on the Mid-Atlantic Ridge. Iceland also refers to the main island of the country, which contains almost all the population and almost all the land area. The country has a population...

, Norway

Norway

Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

 and Switzerland

Switzerland

Switzerland name of one of the Swiss cantons. ; ; ; or ), in its full name the Swiss Confederation , is a federal republic consisting of 26 cantons, with Bern as the seat of the federal authorities. The country is situated in Western Europe,Or Central Europe depending on the definition....

, are exempt. Failure to complete a landing card when this is required is a crime punishable by a fine or six months in prison.