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Postal censorship is the inspection or examination of mail, most often by
government A government is the system or group of people governing an organized community, generally a State (polity), state. In the case of its broad associative definition, government normally consists of legislature, executive (government), execu ...
s. It can include opening, reading and total or selective obliteration of letters and their contents, as well as covers,
postcard A postcard or post card is a piece of thick paper or thin cardboard, typically rectangular, intended for writing and mailing without an envelope. Non-rectangular shapes may also be used but are rare. In some places, one can send a postcard f ...
s, parcels and other postal packets. Postal
censorship Censorship is the suppression of speech, public communication, or other information. This may be done on the basis that such material is considered objectionable, harmful, sensitive, or "inconvenient". Censorship can be conducted by governmen ...
takes place primarily but not exclusively during wartime (even though the nation concerned may not be at war, e.g. Ireland during 1939–1945) and periods of unrest, and occasionally at other times, such as periods of
civil disorder Civil disorder, also known as civil disturbance, civil unrest, civil strife, or turmoil, are situations when law enforcement and security forces struggle to Public order policing, maintain public order or tranquility. Causes Any number of thin ...
or of a
state of emergency A state of emergency is a situation in which a government is empowered to put through policies that it would normally not be permitted to do, for the safety and protection of its citizens. A government can declare such a state before, during, o ...
. Both
covert Secrecy is the practice of hiding information from certain individuals or groups who do not have the "need to know", perhaps while sharing it with other individuals. That which is kept hidden is known as the secret. Secrecy is often controver ...
and overt postal censorship have occurred. Historically, postal censorship is an ancient practice; it is usually linked to
espionage Espionage, spying, or intelligence gathering, as a subfield of the intelligence field, is the act of obtaining secret or confidential information ( intelligence). A person who commits espionage on a mission-specific contract is called an ...
and
intelligence gathering Espionage, spying, or intelligence gathering, as a subfield of the intelligence field, is the act of obtaining secret or Confidentiality, confidential information (Intelligence (information), intelligence). A person who commits espionage on ...
. Both civilian mail and military mail may be subject to censorship, and often different organisations perform censorship of these types of mail. In 20th-century wars the objectives of postal censorship encompassed economic warfare,
security Security is protection from, or resilience against, potential harm (or other unwanted coercion). Beneficiaries (technically referents) of security may be persons and social groups, objects and institutions, ecosystems, or any other entity or ...
and intelligence. The study of postal censorship is a philatelic topic of postal history.


Military mail

Military mail is not always censored by opening or reading the mail, but this is much more likely during wartime and
military campaign A military campaign is large-scale long-duration significant military strategy plan incorporating a series of interrelated military operations or battles forming a distinct part of a larger conflict often called a war. The term derives from th ...
s. The military postal service is usually separate from civilian mail and is usually totally controlled by the military. However, both civilian and military mail can be of interest to
military intelligence Military intelligence is a military discipline that uses information collection and analysis List of intelligence gathering disciplines, approaches to provide guidance and direction to assist Commanding officer, commanders in decision making pr ...
, which has different requirements from civilian intelligence gathering. During wartime, mail from the front is often opened and offending parts blanked or cut out, and civilian mail may be subject to much the same treatment.


Prisoner-of-war and internee mail

Prisoner-of-war and internee mail is also subject to postal censorship, which is permitted under Articles 70 and 71 of the
Third Geneva Convention The Third Geneva Convention, relative to the treatment of prisoners of war, is one of the four treaties of the Geneva Conventions. The Geneva Convention relative to the Treatment of Prisoners of War was first adopted in 1929, but significantl ...
(1929–1949). It is frequently subjected to both military and civil postal censorship because it passes through both postal systems.


Civilian mail

Until recent years, the
monopoly A monopoly (from Greek language, Greek and ) is a market in which one person or company is the only supplier of a particular good or service. A monopoly is characterized by a lack of economic Competition (economics), competition to produce ...
for carrying civilian mails has usually been vested in governments, and that has facilitated their control of postal censorship. The type of information obtained from civilian mail is different from that likely to be found in military mail.


Countries known to have enacted postal censorship

Throughout
modern history The modern era or the modern period is considered the current historical period of human history. It was originally applied to the history of Europe and Western history for events that came after the Middle Ages, often from around the year 1500, ...
, various governments, usually during times of war, would inspect mail coming into or leaving the country so as to prevent an enemy from corresponding with unfriendly entities within that country. There exist also many examples of prisoner of war mail from these countries which was also inspected or censored. Censored mail can usually be identified by various postmarks, dates, postage stamps and other markings found on the front and reverse side of the cover (envelope). These covers often have an adhesive seal, usually bearing special ID markings, which were applied to close and seal the envelope after inspection.


Britain and American colonies

During the years leading up to the
American Revolution The American Revolution (1765–1783) was a colonial rebellion and war of independence in which the Thirteen Colonies broke from British America, British rule to form the United States of America. The revolution culminated in the American ...
, the British monarchy in the American colonies manipulated the mail and newspapers sent between the various colonies in an effort to prevent them from being informed and from organizing with each other. Often mail would be outright destroyed.


American Civil War

During the American Civil War both the Union and Confederate governments enacted postal censorship. The number of Union and Confederate soldiers in prisoner of war camps would reach an astonishing one and a half million men. The prison population at the Andersonville Confederate POW camp alone reached 45,000 men by the war's end. Consequently, there was much mail sent to and from soldiers held in POW installations. Mail going to or leaving prison camps in the North and South was inspected both before and after delivery. Mail crossing enemy lines was only allowed at two specific locations.


Pre-World War I

In Britain, the General Post Office was formed in 1657, and soon evolved a "Secret Office" for the purpose of intercepting, reading and deciphering coded correspondence from abroad. The existence of the Secret Office was made public in 1742 when it was found that in the preceding 10 years the sum of £45,675 () had been secretly transferred from the Treasury to the General Post Office to fund the censorship activities. In 1782 responsibility for administering the Secret Office was transferred to the Foreign Secretary and it was finally abolished by
Lord Palmerston Henry John Temple, 3rd Viscount Palmerston (20 October 1784 – 18 October 1865), known as Lord Palmerston, was a British statesman and politician who served as prime minister of the United Kingdom from 1855 to 1858 and from 1859 to 1865. A m ...
in 1847. During the
Second Boer War The Second Boer War (, , 11 October 189931 May 1902), also known as the Boer War, Transvaal War, Anglo–Boer War, or South African War, was a conflict fought between the British Empire and the two Boer republics (the South African Republic and ...
a well planned censorship was implemented by the British that left them well experienced when The Great War started less than two decades later. Initially offices were in Pretoria and Durban and later throughout much of the
Cape Colony The Cape Colony (), also known as the Cape of Good Hope, was a British Empire, British colony in present-day South Africa named after the Cape of Good Hope. It existed from 1795 to 1802, and again from 1806 to 1910, when it united with three ...
as well a POW censorship with camps in
Bloemfontein Bloemfontein ( ; ), also known as Bloem, is the capital and the largest city of the Free State (province), Free State province in South Africa. It is often, and has been traditionally, referred to as the country's "judicial capital", alongsi ...
, St Helena, Ceylon, India and Bermuda. The
British British may refer to: Peoples, culture, and language * British people, nationals or natives of the United Kingdom, British Overseas Territories and Crown Dependencies. * British national identity, the characteristics of British people and culture ...
Post Office Act 1908 allowed censorship upon issue of warrants by a secretary of state in both Great Britain and in the
Channel Islands The Channel Islands are an archipelago in the English Channel, off the French coast of Normandy. They are divided into two Crown Dependencies: the Jersey, Bailiwick of Jersey, which is the largest of the islands; and the Bailiwick of Guernsey, ...
.


World War I

Censorship played an important role in the First World War. Each country involved utilized some form of censorship. This was a way to sustain an atmosphere of ignorance and give propaganda a chance to succeed. In response to the war, the United States Congress passed the Espionage Act of 1917 and Sedition Act of 1918. These gave broad powers to the government to censor the press through the use of fines, and later any criticism of the government, army, or sale of war bonds. The Espionage Act laid the groundwork for the establishment of a Central Censorship Board which oversaw censorship of communications including cable and mail. Postal control was eventually introduced in all of the armies, to find the disclosure of military secrets and test the morale of soldiers. In Allied countries, civilians were also subjected to censorship. French censorship was modest and more targeted compared to the sweeping efforts made by the British and Americans. In Great Britain, all mail was sent to censorship offices in London or Liverpool. The United States sent mail to several centralized post offices as directed by the Central Censorship Board. American censors would only open mail related to Spain, Latin America or Asia—as their British allies were handling other countries. In one week alone, the San Antonio post office processed more than 75,000 letters, of which they controlled 77 percent (and held 20 percent for the following week). Soldiers on the front developed strategies to circumvent censors. Some would go on "home leave" and take messages with them to post from a remote location. Those writing postcards in the field knew they were being censored, and deliberately held back controversial content and personal matters. Those writing home had a few options including free, government-issued field postcards, cheap, picture postcards, and embroidered cards meant as keepsakes. Unfortunately, censors often disapproved of picture postcards. In one case, French censors reviewed 23,000 letters and destroyed only 156 (although 149 of those were illustrated postcards). Censors in all warring countries also filtered out propaganda that disparaged the enemy or approved of atrocities. For example, German censors prevented postcards with hostile slogans such as "''Jeder Stoß ein Franzos''" ("Every hit a Frenchman") among others.


Between the wars

Following the end of World War I, there were some places where postal censorship was practiced. During 1919 it was operating in
Austria Austria, formally the Republic of Austria, is a landlocked country in Central Europe, lying in the Eastern Alps. It is a federation of nine Federal states of Austria, states, of which the capital Vienna is the List of largest cities in Aust ...
,
Belgium Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeas ...
, Canada, German Weimar Republic and the
Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...
as well as other territories. The
Irish Civil War The Irish Civil War (; 28 June 1922 – 24 May 1923) was a conflict that followed the Irish War of Independence and accompanied the establishment of the Irish Free State, an entity independent from the United Kingdom but within the British Emp ...
saw mail raided by the IRA that was marked as censored and sometimes opened in the newly independent state. The National Army also opened mail and censorship of
irregulars Irregular military is any military component distinct from a country's regular armed forces, representing non-standard militant elements outside of conventional governmental backing. Irregular elements can consist of militias, private army, pr ...
' mail in prisons took place. Other conflicts during which censorship existed included the
Third Anglo-Afghan War The Third Anglo-Afghan War was a short war which began on 3 May and ended on 8 August 1919. The new Amir of the Emirate of Afghanistan Amanullah Khan declared a Jihad against the British in the hope to proclaim full independence, as well as ...
,
Chaco War The Chaco War (, were the Italian occupation of Ethiopia (1935–36) and especially during the
Spanish Civil War The Spanish Civil War () was a military conflict fought from 1936 to 1939 between the Republican faction (Spanish Civil War), Republicans and the Nationalist faction (Spanish Civil War), Nationalists. Republicans were loyal to the Left-wing p ...
of 1936–1939.


World War II

During
World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
, both the Allies and
Axis An axis (: axes) may refer to: Mathematics *A specific line (often a directed line) that plays an important role in some contexts. In particular: ** Coordinate axis of a coordinate system *** ''x''-axis, ''y''-axis, ''z''-axis, common names ...
instituted postal censorship of civil mail. The largest organisations were those of the
United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
, though the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...
employed about 10,000 censor staff while
Ireland Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...
, a small neutral country, only employed about 160 censors. Both
blacklist Blacklisting is the action of a group or authority compiling a blacklist of people, countries or other entities to be avoided or distrusted as being deemed unacceptable to those making the list; if people are on a blacklist, then they are considere ...
s and
whitelist A whitelist or allowlist is a list or register of entities that are being provided a particular privilege, service, mobility, access or recognition. Entities on the list will be accepted, approved and/or recognized. Whitelisting is the reverse of ...
s were employed to observe suspicious mail or listed those whose mail was exempt from censorship.


German censorship

Germany had an extensive censorship system both in Germany and in their occupied territories. Each station was assigned a letter code that was used in their handstamps and censor labels.


Imperial censorship

British censorship was primarily based in the Littlewoods football pools building in
Liverpool Liverpool is a port City status in the United Kingdom, city and metropolitan borough in Merseyside, England. It is situated on the eastern side of the River Mersey, Mersey Estuary, near the Irish Sea, north-west of London. With a population ...
with nearly 20 other censor stations around the country. Additionally the British censored colonial and dominion mail at censor stations in the following places: :Dominions:
Australia Australia, officially the Commonwealth of Australia, is a country comprising mainland Australia, the mainland of the Australia (continent), Australian continent, the island of Tasmania and list of islands of Australia, numerous smaller isl ...
,
Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...
,
Newfoundland Newfoundland and Labrador is the easternmost province of Canada, in the country's Atlantic region. The province comprises the island of Newfoundland and the continental region of Labrador, having a total size of . As of 2025 the population ...
,
New Zealand New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...
,
Southern Rhodesia Southern Rhodesia was a self-governing British Crown colony in Southern Africa, established in 1923 and consisting of British South Africa Company (BSAC) territories lying south of the Zambezi River. The region was informally known as South ...
(not a dominion but supervised by the Dominion office) and
Union of South Africa The Union of South Africa (; , ) was the historical predecessor to the present-day South Africa, Republic of South Africa. It came into existence on 31 May 1910 with the unification of the British Cape Colony, Cape, Colony of Natal, Natal, Tra ...
:Colonies:
Aden Aden () is a port city located in Yemen in the southern part of the Arabian peninsula, on the north coast of the Gulf of Aden, positioned near the eastern approach to the Red Sea. It is situated approximately 170 km (110 mi) east of ...
,
Antigua Antigua ( ; ), also known as Waladli or Wadadli by the local population, is an island in the Lesser Antilles. It is one of the Leeward Islands in the Caribbean region and the most populous island of the country of Antigua and Barbuda. Antigua ...
,
Ascension Island Ascension Island is an isolated volcanic island, 7°56′ south of the Equator in the Atlantic Ocean, South Atlantic Ocean. It is about from the coast of Africa and from the coast of South America. It is governed as part of the British Overs ...
,
Bahamas The Bahamas, officially the Commonwealth of The Bahamas, is an archipelagic and island country within the Lucayan Archipelago of the Atlantic Ocean. It contains 97 per cent of the archipelago's land area and 88 per cent of its population. ...
,
Bahrain Bahrain, officially the Kingdom of Bahrain, is an island country in West Asia. Situated on the Persian Gulf, it comprises a small archipelago of 50 natural islands and an additional 33 artificial islands, centered on Bahrain Island, which mak ...
,
Barbados Barbados, officially the Republic of Barbados, is an island country in the Atlantic Ocean. It is part of the Lesser Antilles of the West Indies and the easternmost island of the Caribbean region. It lies on the boundary of the South American ...
,
Bermuda Bermuda is a British Overseas Territories, British Overseas Territory in the Atlantic Ocean, North Atlantic Ocean. The closest land outside the territory is in the American state of North Carolina, about to the west-northwest. Bermuda is an ...
,
Ceylon Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka, also known historically as Ceylon, is an island country in South Asia. It lies in the Indian Ocean, southwest of the Bay of Bengal, separated from the Indian subcontinent, ...
,
Cyprus Cyprus (), officially the Republic of Cyprus, is an island country in the eastern Mediterranean Sea. Situated in West Asia, its cultural identity and geopolitical orientation are overwhelmingly Southeast European. Cyprus is the List of isl ...
,
Dominica Dominica, officially the Commonwealth of Dominica, is an island country in the Caribbean. It is part of the Windward Islands chain in the Lesser Antilles archipelago in the Caribbean Sea. The capital, Roseau, is located on the western side of t ...
,
Egypt Egypt ( , ), officially the Arab Republic of Egypt, is a country spanning the Northeast Africa, northeast corner of Africa and Western Asia, southwest corner of Asia via the Sinai Peninsula. It is bordered by the Mediterranean Sea to northe ...
,
Falkland Islands The Falkland Islands (; ), commonly referred to as The Falklands, is an archipelago in the South Atlantic Ocean on the Patagonian Shelf. The principal islands are about east of South America's southern Patagonian coast and from Cape Dub ...
,
Fiji Fiji, officially the Republic of Fiji, is an island country in Melanesia, part of Oceania in the South Pacific Ocean. It lies about north-northeast of New Zealand. Fiji consists of an archipelago of more than 330 islands—of which about ...
,
Gambia The Gambia, officially the Republic of The Gambia, is a country in West Africa. Geographically, The Gambia is the List of African countries by area, smallest country in continental Africa; it is surrounded by Senegal on all sides except for ...
,
Gibraltar Gibraltar ( , ) is a British Overseas Territories, British Overseas Territory and British overseas cities, city located at the southern tip of the Iberian Peninsula, on the Bay of Gibraltar, near the exit of the Mediterranean Sea into the A ...
,
Gilbert and Ellice Islands The Gilbert and Ellice Islands (GEIC as a colony) in the Pacific Ocean was part of the British Empire from 1892 to 1976. It was a British protectorate, protectorate from 1892 to 12 January 1916, and then a crown colony, colony until 1 January 1 ...
, Gold Coast,
Grenada Grenada is an island country of the West Indies in the eastern Caribbean Sea. The southernmost of the Windward Islands, Grenada is directly south of Saint Vincent and the Grenadines and about north of Trinidad and Tobago, Trinidad and the So ...
,
British Guiana British Guiana was a British colony, part of the mainland British West Indies. It was located on the northern coast of South America. Since 1966 it has been known as the independent nation of Guyana. The first known Europeans to encounter Guia ...
,
British Honduras British Honduras was a Crown colony on the east coast of Central America — specifically located on the southern edge of the Yucatan Peninsula from 1783 to 1964, then a self-governing colony — renamed Belize from June 1973
,
Hong Kong Hong Kong)., Legally Hong Kong, China in international treaties and organizations. is a special administrative region of China. With 7.5 million residents in a territory, Hong Kong is the fourth most densely populated region in the wor ...
,
Jamaica Jamaica is an island country in the Caribbean Sea and the West Indies. At , it is the third-largest island—after Cuba and Hispaniola—of the Greater Antilles and the Caribbean. Jamaica lies about south of Cuba, west of Hispaniola (the is ...
,
Kenya Kenya, officially the Republic of Kenya, is a country located in East Africa. With an estimated population of more than 52.4 million as of mid-2024, Kenya is the 27th-most-populous country in the world and the 7th most populous in Africa. ...
, Malaya,
Malta Malta, officially the Republic of Malta, is an island country in Southern Europe located in the Mediterranean Sea, between Sicily and North Africa. It consists of an archipelago south of Italy, east of Tunisia, and north of Libya. The two ...
,
Mauritius Mauritius, officially the Republic of Mauritius, is an island country in the Indian Ocean, about off the southeastern coast of East Africa, east of Madagascar. It includes the main island (also called Mauritius), as well as Rodrigues, Ag ...
,
Montserrat Montserrat ( , ) is a British Overseas Territories, British Overseas Territory in the Caribbean. It is part of the Leeward Islands, the northern portion of the Lesser Antilles chain of the West Indies. Montserrat is about long and wide, wit ...
, New Hebrides,
Nigeria Nigeria, officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf of Guinea in the Atlantic Ocean to the south. It covers an area of . With Demographics of Nigeria, ...
, North Borneo,
Northern Rhodesia Northern Rhodesia was a British protectorate in Southern Africa, now the independent country of Zambia. It was formed in 1911 by Amalgamation (politics), amalgamating the two earlier protectorates of Barotziland-North-Western Rhodesia and North ...
,
Nyasaland Nyasaland () was a British protectorate in Africa that was established in 1907 when the former British Central Africa Protectorate changed its name. Between 1953 and 1963, Nyasaland was part of the Federation of Rhodesia and Nyasaland. After ...
,
Palestine Palestine, officially the State of Palestine, is a country in West Asia. Recognized by International recognition of Palestine, 147 of the UN's 193 member states, it encompasses the Israeli-occupied West Bank, including East Jerusalem, and th ...
,
Penang Penang is a Malaysian state located on the northwest coast of Peninsular Malaysia along the Strait of Malacca. It has two parts: Penang Island, where the capital city, George Town, is located, and Seberang Perai on the Malay Peninsula. Th ...
, St. Helena,
St. Lucia Saint Lucia is an island country of the West Indies in the eastern Caribbean. Part of the Windward Islands of the Lesser Antilles, it is located north/northeast of the island of Saint Vincent (Saint Vincent and the Grenadines), Saint Vincent ...
, St. Kitts and Nevis, St. Vincent,
Sarawak Sarawak ( , ) is a States and federal territories of Malaysia, state of Malaysia. It is the largest among the 13 states, with an area almost equal to that of Peninsular Malaysia. Sarawak is located in East Malaysia in northwest Borneo, and is ...
,
Seychelles Seychelles (, ; ), officially the Republic of Seychelles (; Seychellois Creole: ), is an island country and archipelagic state consisting of 155 islands (as per the Constitution) in the Indian Ocean. Its capital and largest city, Victoria, ...
,
Sierra Leone Sierra Leone, officially the Republic of Sierra Leone, is a country on the southwest coast of West Africa. It is bordered to the southeast by Liberia and by Guinea to the north. Sierra Leone's land area is . It has a tropical climate and envi ...
,
British Solomon Islands The British Solomon Islands Protectorate was first established in June 1893, when Captain Herbert Gibson of declared the southern Solomon Islands a British protectorate.''Commonwealth and Colonial Law'' by Kenneth Roberts-Wray, London, S ...
,
Somalia Somalia, officially the Federal Republic of Somalia, is the easternmost country in continental Africa. The country is located in the Horn of Africa and is bordered by Ethiopia to the west, Djibouti to the northwest, Kenya to the southwest, th ...
,
Sudan Sudan, officially the Republic of the Sudan, is a country in Northeast Africa. It borders the Central African Republic to the southwest, Chad to the west, Libya to the northwest, Egypt to the north, the Red Sea to the east, Eritrea and Ethiopi ...
, Tanganyika,
Trinidad Trinidad is the larger, more populous island of the Republic of Trinidad and Tobago, the country. The island lies off the northeastern coast of Venezuela and sits on the continental shelf of South America. It is the southernmost island in ...
,
Tonga Tonga, officially the Kingdom of Tonga, is an island country in Polynesia, part of Oceania. The country has 171 islands, of which 45 are inhabited. Its total surface area is about , scattered over in the southern Pacific Ocean. accordin ...
,
Uganda Uganda, officially the Republic of Uganda, is a landlocked country in East Africa. It is bordered to the east by Kenya, to the north by South Sudan, to the west by the Democratic Republic of the Congo, to the south-west by Rwanda, and to the ...
,
Virgin Islands The Virgin Islands () are an archipelago between the Atlantic Ocean, North Atlantic Ocean and northeastern Caribbean Sea, geographically forming part of the Leeward Islands of the Lesser Antilles in the Caribbean, Caribbean islands or West Indie ...
and
Zanzibar Zanzibar is a Tanzanian archipelago off the coast of East Africa. It is located in the Indian Ocean, and consists of many small Island, islands and two large ones: Unguja (the main island, referred to informally as Zanzibar) and Pemba Island. ...
,


United States

In the United States censorship was under the control of the
Office of Censorship The Office of Censorship was an emergency wartime agency set up by the United States federal government on December 19, 1941, to aid in the censorship of all communications coming into and going out of the United States, including its territories ...
whose staff count rose to 14,462 by February 1943 in the censor stations they opened in New York,
Miami Miami is a East Coast of the United States, coastal city in the U.S. state of Florida and the county seat of Miami-Dade County, Florida, Miami-Dade County in South Florida. It is the core of the Miami metropolitan area, which, with a populat ...
,
New Orleans New Orleans (commonly known as NOLA or The Big Easy among other nicknames) is a Consolidated city-county, consolidated city-parish located along the Mississippi River in the U.S. state of Louisiana. With a population of 383,997 at the 2020 ...
,
San Antonio San Antonio ( ; Spanish for " Saint Anthony") is a city in the U.S. state of Texas and the most populous city in Greater San Antonio. San Antonio is the third-largest metropolitan area in Texas and the 24th-largest metropolitan area in the ...
, Laredo, Brownsville,
El Paso El Paso (; ; or ) is a city in and the county seat of El Paso County, Texas, United States. The 2020 United States census, 2020 population of the city from the United States Census Bureau, U.S. Census Bureau was 678,815, making it the List of ...
, Nogales,
Los Angeles Los Angeles, often referred to by its initials L.A., is the List of municipalities in California, most populous city in the U.S. state of California, and the commercial, Financial District, Los Angeles, financial, and Culture of Los Angeles, ...
,
San Francisco San Francisco, officially the City and County of San Francisco, is a commercial, Financial District, San Francisco, financial, and Culture of San Francisco, cultural center of Northern California. With a population of 827,526 residents as of ...
,
Seattle Seattle ( ) is the most populous city in the U.S. state of Washington and in the Pacific Northwest region of North America. With a population of 780,995 in 2024, it is the 18th-most populous city in the United States. The city is the cou ...
,
Chicago Chicago is the List of municipalities in Illinois, most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the 2020 United States census, 2020 census, it is the List of Unite ...
, San Juan, Charlotte Amalie, Balboa, Cristóbal, David, Panama,
Honolulu Honolulu ( ; ) is the List of capitals in the United States, capital and most populous city of the U.S. state of Hawaii, located in the Pacific Ocean. It is the county seat of the Consolidated city-county, consolidated City and County of Honol ...
,
Pago Pago Pago Pago ( or ; Samoan language, Samoan: )Harris, Ann G. and Esther Tuttle (2004). ''Geology of National Parks''. Kendall Hunt. Page 604. . is the capital of American Samoa. It is in Maoputasi County, American Samoa, Maoputasi County on Tutuila ...
and
Washington, D.C. Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and federal district of the United States. The city is on the Potomac River, across from Virginia, and shares land borders with ...
The United States blacklist, known as U.S. Censorship Watch List, contained 16,117 names.


Neutral countries

Neutral countries such as
Ireland Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...
,
Portugal Portugal, officially the Portuguese Republic, is a country on the Iberian Peninsula in Southwestern Europe. Featuring Cabo da Roca, the westernmost point in continental Europe, Portugal borders Spain to its north and east, with which it share ...
and
Switzerland Switzerland, officially the Swiss Confederation, is a landlocked country located in west-central Europe. It is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland ...
also censored mail even though they were not directly involved in the conflict.


Post-World War II

Following the end of hostilities in Europe, Germany was occupied by the Allied Powers in zones of control. Censorship of mail that had been impounded during the Allies advances, when postal services were suspended, took place in each zone though by far the least commonly seen mail is from the French Zone. When most of the backlog had been cleared regular mail was controlled as well as in occupied Austria. Soviet zone mail is considered scarce. In the
German Democratic Republic East Germany, officially known as the German Democratic Republic (GDR), was a country in Central Europe from Foundation of East Germany, its formation on 7 October 1949 until German reunification, its reunification with West Germany (FRG) on ...
, the
Stasi The Ministry for State Security (, ; abbreviated MfS), commonly known as the (, an abbreviation of ), was the Intelligence agency, state security service and secret police of East Germany from 1950 to 1990. It was one of the most repressive pol ...
, established in 1950, were responsible for the control of incoming and outgoing mail; at their height of operations, their postal monitoring department controlled about 90,000 pieces of mail daily. Several small conflicts saw periods of postal censorship, such as the 1948 Palestine war,
Korean War The Korean War (25 June 1950 – 27 July 1953) was an armed conflict on the Korean Peninsula fought between North Korea (Democratic People's Republic of Korea; DPRK) and South Korea (Republic of Korea; ROK) and their allies. North Korea was s ...
(1950–1953),
Poland Poland, officially the Republic of Poland, is a country in Central Europe. It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains in the south, bordered by Lithuania and Russia to the northeast, Belarus and Ukrai ...
(1980s), or even the 44-day Costa Rican Civil War in 1948.


See also

* American Civil War prisoner of war mail * Black room *
Cabinet noir In France, the ''cabinet noir'' (; French for " black room", also known as the "dark chamber" or " black chamber") was a government intelligence-gathering office, usually within a postal service, where correspondence between persons or entities ...
* Comstock Act * Israeli Military Censor * Mail censorship in Ireland * Secrecy of correspondence * United States Office of Censorship


References and notes

Notes Books * * * * * * * Papers & reports * * *


External links


The secret spying arm of the Post Office
BBC History Extra magazine

Linn's Stamp News
Why Mail Censorship is Vital to Britain
(1916) Interview with Lord Robert Cecil, British Minister of Blockade (Wayback Machine archive link)
Postalcensorship.com
Website devoted to ''postal censorship'' with many examples of censored
mail The mail or post is a system for physically transporting postcards, letter (message), letters, and parcel (package), parcels. A postal service can be private or public, though many governments place restrictions on private systems. Since the mid ...

Civil Censorship Study GroupForces Postal History SocietyMilitary Postal History Society
{{DEFAULTSORT:Postal Censorship
Censorship Censorship is the suppression of speech, public communication, or other information. This may be done on the basis that such material is considered objectionable, harmful, sensitive, or "inconvenient". Censorship can be conducted by governmen ...
Censorship Law of war Civilians in war National security