The names used and the presentation of the material on this map do not imply the expression of any opinion of the European Union on the legal status of any country, territory, city or territory or its authorities, or on the delimitation of its borders or borders. Also known as Visa on Arrival (VOA), they are issued at a port of entry. This differs from the visa waiver, which does not require a visa, since the visitor must obtain the visa on arrival before going to immigration control. In some countries that exempt visitors of certain nationalities from the visa requirement, it is still necessary to obtain prior authorization before arriving by plane. These travel authorizations usually have a duration of several years and can be used repeatedly. .