ESTA FORMS NOW COMPULSORY FOR VISITING USA

ESTA REPLACING I-94W IMMIGRATION FORMS FOR VISA WAIVER UPDATE
Most British holidaymakers can travel to the US under the visa-waiver scheme. Since January 12 2009, those wishing to do so have been required to complete an online application known as ESTA – the Electronic System for Travel Authorisation.

ESTA is replacing the I-94W immigration forms issued on the plane.
While the technology is being sorted out, however, you may have to duplicate the information supplied online on the old green forms.

You have no option but to apply for ESTA online.

You are advised to supply details at least three days before travel, but last-minute applications are possible.

ESTA registration is free – be wary of commercial websites that charge to make the application.

The biographical and travel details required for ESTA are the same as on the I-94W form. You don’t have to give the precise address of where you are staying to complete the application, although an immigration officer may well ask for it when you arrive.

The ESTA permit covers travel to the US for two years, and you need to update travel information on subsequent visits. You still need to provide airlines with separate “Advance Passenger Information”.Applications on https://esta.cbp.dhs.gov/.

http://www.visitusa.org.uk/visitors/us_visa_and_entry_requirements.aspx gives useful information as well.