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What is the difference between ‘Application Number’ and ‘Travel Authorization Number’ in ESTA?

The Application Number identifies your ESTA application; the Travel Authorization Number confirms your approval to travel to the U.S. under the visa waiver program.

Written by

Victoria Harper

Editor-in-Chief

Updated on February 28, 2026
2 min read
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The ESTA application process may seem full of details at first glance, but understanding each term helps make the whole experience smoother. Two of these terms are the “Application Number” and the “Travel Authorization Number,” and each has its specific role in the process.

The “Application Number” is the registration number you receive when you submit your ESTA request through the electronic system. This number serves as a unique identifier for your application, allowing you to access and track the status of your request during processing. In other words, it is an internal reference that enables you to trace all stages of your application.

The “Travel Authorization Number,” on the other hand, is the authorization number issued when your ESTA is approved. This number confirms that you have received authorization to travel to the United States under the Visa Waiver Program. It is the number you must have on hand to present, if requested, during your trip or at border check procedures.

It is important to emphasize that all these processes must be conducted in accordance with U.S. immigration laws. Always check the information on official government websites and be cautious of companies or marketing campaigns that promise miraculous results or guarantees of approval. Strict compliance with the rules is essential to avoid complications in your international travel.

If questions arise or you need assistance with correctly filling out the data, it is always advisable to rely on information from official sources and, if necessary, seek guidance from trustworthy channels. Staying well-informed and acting cautiously is the best way to ensure that everything proceeds without unexpected issues.

Learn more about ESTA

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Victoria Harper

Editor-in-Chief

Meet the author

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.

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What is the difference between ‘Application Number’ and ‘Travel Authorization Number’ in ESTA?

The Application Number identifies your ESTA application; the Travel Authorization Number confirms your approval to travel to the U.S. under the visa waiver program.

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