most notable crossing where visas on arrival are not issued is the Padang Besar checkpoint for passenger trains between Malaysia and Thailand. Electronic visas An electronic visa (e-Visa or eVisa) is stored in a computer and is linked to the passport number so no label, sticker, or stamp is placed in the passport before travel. The application is done over the internet, and the receipt acts as a visa, which can be printed or stored on a mobile device. Entry and duration period Visas can also be single-entry, which means the visa is cancelled as soon as the holder leaves the country; double-entry, or multiple-entry, which permits double or multiple entries into the country with the same visa. Countries may also issue re-entry permits that allow temporarily leaving the country without invalidating the visa. Even a business visa will normally not allow the holder to work in the host country without an additional work permit. Once issued, a visa will typically have to be used within a certain period of time. In some countries, the validity of a visa is not the same as the authorized period of stay. The visa validity then indicates the time period when the entry is permitted into the country. For example, if a visa has been issued to begin on 1 January and to expire on 30 March, and the typical authorized period of stay in a country is 90 days, then the 90-day authorized stay starts on the day the passenger enters the country (entrance has to be between 1 January and 30 March). Thus, the latest day the traveller could conceivably stay in the issuing country is 1 July (if the traveller entered on 30 March). This interpretation of visas is common in the Americas. With other countries, a person may not stay beyond the period of validity of their visa, which is usually set within the period of validity of their passport. The visa may also limit the total number of days the visitor may spend in the applicable territory within the period of validity. This interpretation of visa periods is common in Europe. Once in the country, the validity period of a visa or authorized stay can often be extended for a fee at the discretion of immigration authorities. Overstaying a period of authorized stay given by the immigration officers is considered illegal immigration even if the visa validity period