Canadians need proof of Canadian citizenship or a passport to enter the USA. All other visitors must have a valid passport, which should be valid for at least six months longer than their intended stay in the USA.

Travellers from countries such as Andorra, Australia, Austria, Belgium, Denmark, France, Germany, Ireland, Italy, Japan, the Netherlands, New Zealand, Spain, Switzerland and the United Kingdom can enter the USA for up to 90 days under a visa-waiver program if they have a round-trip ticket that is nonrefundable in the US, and have a passport valid for at least six months past their scheduled departure date. All other travellers will need a visitor's visa. Visas can be obtained at most US consulate offices overseas; however, it is generally easier to obtain a visa from an office in one's home country.

The USA is regularly adjusting entry requirements in an effort to reduce the threat of terrorism. It is imperative that travellers double- and triple-check current regulations before coming to the USA, as changes will occur for several years. A procedure introduced in 2004 requires most visitors travelling on visas to the United States to have two fingerprints scanned by an inkless device and a digital photograph taken by immigration officials upon entry at US air and seaports.

Under new regulations to be phased in toward the end of 2005, travellers from VWP-eligible countries will need to present a biometric passport or US visa to enter the country. You don't need a visa if: your passport was issued before October 26, 2005, but is 'machine readable'; if it was issued on or after October 26, 2005, and includes a digital photo as well as being machine readable; or if it was issued on or after October 26, 2006, and contains a digital photo and 'biometric data,' such as digital iris scans and fingerprints. Further details and information on the changes to the visa system can be found at www.travel.state.gov/visa.