A visa, in a way, is permit authorizing a person to enter the country which issued the visa. The visa is a document, which takes the form of a stamp on the passport of the applicant. As a result of treaties and agreements, there are countries which no longer require a visa to enter; example would be Hong Kong. The country that issues the visa indicates various conditions to the visa, for how long is the visa valid and how long the person may stay in the country, whether the visa is valid for just one visit or more, etc. At anytime, a visa may be revoked. One example of a visa is a business visa. Getting a business visa application to be approved may take more time compared to a tourist visa or a student visa.
One factor in the approval of a business visa application is how developed and industrialized is the country. The more developed and industrialized the country is, the greater the number of considerations before the government gives its stamp of approval. The 9/11 attack on the United States really put a damper on business visa application; the destruction elevated the awareness of the government on the threat of international terrorism and became more vigilant as to foreigners who were going in and out of the country. From then on, countries like the US, Australia, and major counties of the European Union became more meticulous to those who bear a business visa application, lest their so-called “business” be not so legitimate at all.