If your name has changed but you have not yet submitted your application, then you
should make your changes and submit it. Bear in mind that although the form can be
completed in minutes and the process of obtaining authorisation is quick, the U.S.
authorities recommend completing the form at least 72 hours prior to your flight,
or at the time of booking. Make sure all information is correct before submitting
to ensure things run smoothly.
If you have already submitted your form, making alterations to your application depends
on the type of information you wish to change. Information such as your destinations,
city of embarkation, email address, phone number, flight details, the address where you
will be staying in the United States, etc., can be changed at any time (by clicking on
the “Update or Check Status button” on your ESTA form) because these have no effect on
the decision of our registration. However, a changes to details such as in your last
name, gender, country of residence, citizenship, or any other biographical information,
or to any questions relating to your eligibility to enter the U.S. require you
an entirely new ESTA form