A visa is a conditional authorization granted by a polity to a foreigner that allows them to enter, remain within, or leave its territory. Visas typically include limits on the duration of the foreigner's stay, areas within the country they may enter, the dates they may enter, the number of permitted visits, or if the individual can work in the country in question. Visas are associated with the request for permission to enter a territory and thus are, in most countries, distinct from actual formal permission for an alien to enter and remain in the country. In each instance, a visa is subject to entry permission by an immigration official at the time of actual entry and can be revoked at any time. Visa evidence most commonly takes the form of a sticker endorsed in the applicant's passport or other travel document but may also exist electronically. Some countries no longer issue physical visa evidence, instead recording details only in immigration databases.
Visitors to the United States must obtain a visa from one of the U.S. diplomatic missions unless they are citizens of one of the visa-exempt or Visa Waiver Program countries.
The Electronic System for Travel Authorization (ESTA) is an automated system that determines the eligibility of visitors to travel to the United States under the Visa Waiver Program (VWP). ESTA was mandated by the Implementing Recommendations of the 9/11 Commission Act of 2007. ESTA only authorizes travel to a U.S. airport, border, or port of entry, but admissibility into the United States is determined by a U.S. Customs and Border Protection (CBP) officer upon arrival. The ESTA application collects biographic information and answers to VWP eligibility questions.
The visa policy of mainland China deals with the requirements which a foreign citizen must meet to travel to, enter, and remain in the mainland of the People's Republic of China. Several categories of visas are available, depending on the purpose and length of stay. Chinese visas are issued outside China by the Chinese diplomatic missions and in China by the exit and entry administrations (EEAs) of the county-level public security bureaus (PSBs). Visa exemptions exist for citizens of certain countries based on bilateral agreements and unilateral decisions.
Visa requirements for Pakistani citizens are the requirements by other countries to obtain a visa before entry on an ordinary Pakistani Passport.
The visa policy of the Kingdom of Bhutan is strictly regulated under the policy of "High Value, Low Volume" tourism, in order to minimize the effect on the country's unique society and environment. Bhutanese policy ensures that only an acceptable number of tourists enter the country at a time, preventing the country from being overwhelmed by mass tourism and consequently changing its character, and that tourists who do arrive get the best experience and value from their visit.
The visa policy of Malaysia consists of the requirements for foreign nationals to travel to, enter, and remain in Malaysia. Most visitors to Malaysia are granted visa-free entry for a period of 90, 30, or 14 days respectively. However, nationals from some countries must first obtain a visa from one of the Malaysian diplomatic missions around the world before being allowed into the country.
The visa policy of Singapore deals with the requirements a traveller must meet to enter Singapore. A foreign national, depending on their country of origin, must meet certain requirements to obtain a visa, which is a permit to travel, to enter and remain in the country. A visa may also entitle the visa holder to other privileges, such as a right to work, study, etc. and may be subject to conditions.
Visitors to Azerbaijan must obtain a visa from one of the Azerbaijani diplomatic missions unless they are citizens of one of the visa-exempt countries, or citizens eligible for an electronic visa on arrival, or citizens eligible for an electronic visa.
Most visitors to Iran must obtain an electronic visa (e-Visa) prior to their arrival in Iran, unless they are a citizen of one of the visa-exempt countries or countries that are ineligible for an e-Visa, in which case they must obtain a visa in advance from one of the Iranian diplomatic missions around the world.
Visa requirements for Slovenian citizens are administrative entry restrictions imposed on citizens of Slovenia by the authorities of other states. As of July 2024, Slovenian citizens had visa-free or visa on arrival access to 184 countries and territories, ranking the Slovenian passport 10th overall in terms of travel freedom, according to the Henley Passport Index.
Visa requirements for Liechtenstein citizens are administrative entry restrictions by the authorities of other states placed on citizens of Liechtenstein. As of October 2024, Liechtenstein citizens had visa-free or visa on arrival access to 182 countries and territories, ranking the Liechtenstein passport 12th in terms of travel freedom overall, and the lowest of the EFTA member states, according to the Henley Passport Index.
The visa policy of Lebanon deals with the requirements which a foreign national wishing to enter the Republic of Lebanon must meet to be permitted to travel to, enter and remain in the country.
Visitors to Qatar must obtain a visa, unless if they are citizens of one of the GCC countries or if they are citizens of one of the countries eligible for a visa waiver on arrival.
Visitors to Saudi Arabia must obtain a visa, unless they come from one of the visa exempt countries.
Visa requirements for European Union citizens are administrative entry restrictions by the authorities of other countries placed on citizens of the European Union. They differ among countries. The European Union has achieved full reciprocity with certain countries.
All visitors to Djibouti must obtain either a visa on arrival to Djibouti, an electronic visa online or a visa from one of the Djiboutian diplomatic missions prior to arrival in Djibouti, unless they come from one of the visa exempt countries mentioned below.
Visitors to Syria must obtain an e-Visa in advance, unless they are a national of a visa-exempt country or a country whose citizens are eligible to obtain visas on arrival. Visitors can obtain a visa from one of the Syrian diplomatic missions.
The British Overseas Territories maintain their own entry requirements different from the visa policy of the United Kingdom. As a general rule, British citizens do not have automatic right of abode in these territories.
An electronic visa (E-Visa) and an electronic travel authorization are digital travel permits commonly required in conjunction with a valid passport for entry into specific jurisdictions. These electronic travel documents have gained prominence in the modern era of digital connectivity and streamlined travel processes.
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