If you are a UK citizen and have a post-dated passport that won’t be
valid until a certain date (due to name change for example), 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 the detail change (i.e. marriage, divorce, gender change or civil partnership ceremony),
you will not be able to use it to apply until that day.
You should check the validity of your passport before you apply for ESTA and well
in advance of the day you travel to make sure that everything is in order. It is
always recommended that you travel with a passport that is valid for at least six
months from the date of your travel. Read More