You can check the
status of your ESTA
at any time. You can contact us at any time to check on its
status. If it has been less than two years since you applied, and your passport is still valid,
then your ESTA should be valid too.
Your ESTA authorisation will run out the two years from the date on which it was authorised, or
when your passport expires, whichever is the sooner date.
ESTA does not renew itself automatically, irrespective of whether you actually visit the USA or not
at any point during the two-year period. When the two-year period ends, or your passport expires,
you will need to apply for a new ESTA yourself, following the same procedures as you did the first
time you applied for ESTA
via the website.