English 
Português 
Español To begin with, it”s important to understand that the ESTA (Electronic System for Travel Authorization) is linked to the passport number provided in the application and is not an independent document. In other words, any authorization granted by ESTA is tied to the details of the passport you used to obtain the approval.
If your old passport is still valid – that is, if its expiration date is after your trip – and the ESTA was approved for that document, you can use it normally for boarding and entry into the United States. However, it is essential that the passport remains within the validity period required by the Visa Waiver Program rules.
On the other hand, if you already have a new passport or if the old document is close to expiring or has expired, the situation changes. Since the ESTA is linked to the passport number, you can only use the authorization if you are traveling with the passport on which the ESTA was issued and that is valid. In cases where the passport has been renewed, it is advisable to apply for a new ESTA before traveling, as the new document will have a new passport number.
Always remember the importance of strictly following US immigration laws and regulations. Always check updated information on official websites and, if you have doubts, seek official sources or trusted specialized guidance. This way, you can avoid unwanted surprises and possible immigration problems, as well as protect yourself from scams and campaigns with miracle promises.
I hope this information has clarified your doubt. If you have other questions or need more information, continue seeking reliable sources and keep your documents up to date for a smooth trip.
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Victoria Harper
Editor-in-Chief
Leading journalism and editorial content at Visto n’ Visa, Victoria helps make immigration topics clear, trustworthy, and easy to understand. Her focus is on delivering useful, human, and relevant content for people exploring new paths abroad.
