If you are a UK citizen and have a post-dated passport that won’t be valid until a certain date,
you will not be able to apply for ESTA, as you need to apply using a passport that is valid at
the time the application is submitted. Since a post-dated passport is only valid from the date
of your divorce, gender change, marriage, or civil partnership ceremony, you will not be able
to use it to apply until that day.
It would be best to check the validity of your passport before you apply for ESTA and well
before the day you travel to make sure that everything is okay. It’s always recommended
that you travel with a passport that is valid for at least 6 months from the date of your travel.
It is possible to get a third party to apply for you if you do not have time between the
ceremony or other finalisation that will render the document valid and your journey to the
The application procedure
is usually completed in a few minutes, but it’s recommended that you leave more time.