Made a Mistake on Your TDAC?How to Update It Before You Fly

Short answer

Yes, most mistakes can be fixed. The official TDAC website has an Update Arrival Card option. You look up your card with your TDAC number, passport number, date of birth and nationality, then change the details that are allowed to change.

Core identity fields are treated differently. Reports from travel guides say name, date of birth and nationality cannot be edited after submission, while smaller details such as flight or accommodation can. If an identity detail is wrong, the safest route is to check the official site and, if needed, submit a new card with the correct data.

What people usually need to change

• Hotel or address: update the same card if your first stay in Thailand changes.
• Flight number or arrival date: update it if your booking changes, but remember the 3-day window still applies to the new arrival date.
• Contact details: email and phone are the easy ones to correct.
• Passport number or name typo: this is the risky one. It must match your passport exactly, so check the official site for what is editable.

How to update your card

1. Open the official TDAC site from the link on this page, not from an ad.
2. Choose Update Arrival Card.
3. Enter your TDAC number, passport number, date of birth and nationality to find your card.
4. Change the allowed fields and review everything.
5. Submit, then save the new confirmation or QR code. Delete or ignore the old one so you do not show the wrong version.

Mistakes that cause real trouble

• Passport number that does not match the passport you will carry.
• Wrong nationality or date of birth.
• A hotel name that is only a placeholder. Use the real first address.
• Paying a third-party site to "fix" the card. The official site is free.

Before you travel

Screenshot the final confirmation and keep it on your phone. If you are unsure whether a correction was accepted, check the card again on the official site rather than assuming. Rules can change, so confirm on the official portal.

More answers on this topic

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• TDAC for Family or Group: One Form or Separate Forms?
• Pakistani Passport for Thailand: Visa and TDAC
• Arrival Card Scam Websites: How to Spot the Fake Ones
• Arrival Card vs Visa: What Is the Difference?
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