Visitors entering the country under the Visa Waiver Programme (VWP) must have a machine-readable passport (MRP) that has a bar code on the photo page. From 26 October 2006 eligible travellers under the VWP must include biometrics in their machine-readable passports if they wish to enter the country without a visa, containing unique personal data such as fingerprints or iris details. All new passports issued on or after 26 October 2005 must contain a digital photo image in order to travel visa-free.

Due to new security measures, all visitors to the USA will have a photograph and two fingerprints taken by an inkless scanner on arrival, including those travelling visa-free under the Visa Waiver Programme. As part of the Western Hemisphere Travel Initiative (WHTI), all travellers travelling between the United States and Canada, Mexico, Bermuda, and the Caribbean region are required to present a passport or other valid travel document to enter or re-enter the United States.

If departing from the USA a valid passport will be required by immigration authorities. A new security regulation, in force from 2009, means that all visitors who do not need a visa under the US visa waiver programme will need to register online three days before travel. This will allow the US government to screen all visitors before travel. The new programme will be mandatory for all visa-free travel from 12 January 2009. For more information on visa visit: http://travel.state.gov/visa/visa_1750.html