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How many letters and numbers does the ESTA form have?

The ESTA authorization number has nine numeric digits and is generated automatically; obtain it only on the official website to avoid scams.

Written by

Victoria Harper

Editor-in-Chief

Updated on December 23, 2025
2 min read
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ESTA – the Electronic System for Travel Authorization – is an essential component for citizens of countries participating in the Visa Waiver Program when traveling to the United States. This system streamlines the authorization process and allows travelers to fill in their information online.

Therefore, it is very important to pay attention to official information and always follow U.S. immigration laws, avoiding any dubious websites or promises that could compromise your application.

Regarding your question, the ESTA authorization number consists of only nine digits, that is, nine numbers, with no letters present. This unique number is automatically generated when the application is processed and approved and serves to identify your request within the system.

It is worth remembering that any official communication or letter related to your authorization will mention this number, which is strictly numeric. It is essential that you obtain this authorization only through the official website of the United States Department of Homeland Security or through trusted sources. This way, you avoid falling victim to scams or campaigns promising miraculous solutions.

Always follow the regulations and, if you have doubts, seek information directly from the competent authorities. I hope this information has been helpful and contributes to a better understanding of the process. Remember: staying well informed is an essential part of any immigration process.

Learn more about ESTA

All about ESTA
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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How many letters and numbers does the ESTA form have?

The ESTA authorization number has nine numeric digits and is generated automatically; obtain it only on the official website to avoid scams.

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