Electronic System for Travel Authorization (ESTA)

If you are a citizen or eligible national of a Visa Waiver Program (VWP) country and don’t already have pre-authorisation to travel to USA via the Electronic System for Travel Authorization (ESTA), please click the button below.

GO   to the US Customs and Border Protection website for information about VWP eligibility and ESTA

Invitation Letter to accompany of US Visitor Visa application

You should only need to complete the form below if you:

  • are not able to travel to USA under the Visa Waiver Program (VWP), and,
  • would like to request an Invitation Letter to accompany your US Visitor Visa application.


  • Invitation Letters cannot be issued before Attendance Fees are paid.
  • If your US Visitor Visa application is not successful, ICAEA will refund your Attendance Fee.
  • ICAEA and ERAU are not able to provide additional guidance to the above about obtaining a US visa.
  • If you are in any doubt about your VWP eligibility and ESTA, or what type of visa you will need to enter the USA, we suggest you contact the US Embassy in your home country.



Name on Passport:

Passport Number:

Passport Country of Issue:

Email Address:

Job / Position:

Company / Organisation:


Event Name:

Amount Paid (USD):

Date Paid:


Please check you have completed all fields and the information you entered is correct.
Are you ready to submit the request?