You must have an e-Passport to travel to the US
You should see a symbol on the front if you have an e-Passport.
If you don't have one you will not be permitted to travel.
What is an ESTA?
To make your visit to the United States, you must either travel under the country’s Visa Waiver programme (with an ‘ESTA’), or have a US visa (or be a US citizen, of course).
An ESTA allows you to stay in the US under the Visa Waiver programme for up to 90 days and allows travel to Mexico, Canada and the Caribbean.
An ESTA is valid for two years, (or less if your passport expires in that time).
Countries applicable for the Visa Waiver Programme
If you are from one of the following countries, you can travel under this programme unless
If this applies to you, you will still be able to apply for a visa using the regular immigration process via the US embassies or consulates (contact details below), but you will no longer be able to enter the US under the Visa Waiver Programme (ESTA).
If you already hold an Electronic System for Travel Authorizations (ESTA) and you previously indicated that you have dual nationality with one of the four countries listed above on your ESTA application, your ESTA will no longer be valid.
ESTA Application Requirements:
To obtain your ESTA:
Apply for an ESTA Direct with US Homeland Security:
https://esta.cbp.dhs.gov/esta/
You can apply for your ESTA directly with US Homeland security, at a charge of $14
US Embassy
Opening hours: Mon to Fri, 08.30 - 17.30
Telephone: 0207 499 9000