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Passports
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Passports are usually required for international travel, though this is not always the case; they serve only as an internationally-recognised means of identification of the traveller. This requirement may be waived (the terminology may vary in different countries) in individual cases or for classes of travellers. For example, citizens of some member states of the European Union do not need a passport to travel within each other under Schengen Agreement, and, until recently, citizens of the United States could enter Mexico, Canada, or many Caribbean Nations using a driving licence as identification and a birth certificate or naturalization certificate as proof of citizenship.
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Those applicants whose passports are issued in their maiden names will have their visas issued in their maiden names. Applicants should bring all current and former/expired passports with them to the consulate for their interview.
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The League of Nations held a conference in 1920 about passports and through-train travel, and conferences in 1926 and 1927 about passports. The 1920 conference put forward guidelines on the layout and features of passports, which the 1926 and 1927 conferences followed up. Those guidelines were steps in the shaping of contemporary passports. One of the guidelines was about 32-page passport booklets, such as the U.S. type III mentioned in this section, below. Another guideline was about languages in passports. See Languages, below.
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U.S. Embassies and Consulates will continue to issue passports in emergency cases. However, emergency passports will be limited in validity and cannot be extended. Bearers will be required to exchange their limited validity passports for full-validity photo-digitized passports upon completion of their emergency travel, either through a passport facility in the U.S. or a U.S. embassy or consulate abroad.
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Machine-readable passports are standardized world-wide by the ICAO.[5] They bear a zone where some of the information otherwise written in textual form is written as strings of alphanumeric characters, printed in a manner suitable for optical character recognition. This enables border controllers and other law enforcement agents to process such passports quickly, without having to input the information manually into a computer.
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Passports