How to Correct or Update Your Thailand Digital Arrival Card in 2026

When Should You Submit a New TDAC Instead?

Submit a new Thailand Digital Arrival Card when the update function does not let you change the field you need to correct, or when you are unsure whether the correction was saved properly. The official FAQ says the TDAC can be submitted multiple times with correct information and that the most recent valid entry will be used.

This is especially useful for travelers who notice a serious error after submission. Instead of traveling with a TDAC that may not match your passport or itinerary, complete a fresh submission with the correct details and save the latest QR code.

Passport, Name, Nationality, and Birth Date Mistakes

These are the mistakes to treat seriously. Your TDAC details should match the passport you will present to the airline and Thai immigration. If your full name, passport number, nationality, or date of birth is wrong, do not assume the officer can simply overlook it at the checkpoint.

The official TDAC pages identify some identity details as fields that may not be available for normal updating. Because official wording can vary between the guide and FAQ, the practical traveler rule is simple: if a core identity detail is wrong, submit a new TDAC with the correct details and use the latest confirmation.

Common passport number errors

• Typing the letter O instead of the number 0
• Typing the number 1 instead of the letter I
• Leaving out a letter at the beginning or end
• Using an old passport number after renewing your passport
• Entering spaces or symbols that are not shown in the passport number

What If Your Flight, Hotel, or Arrival Date Changes?

Travel changes are common, and this is where the update function is most helpful. If your airline changes your flight number, your arrival date moves, or you switch hotels before arriving in Thailand, update the TDAC or submit a fresh one before entry.

Flight number changed

If the flight number changes but your arrival date and airport remain the same, update your trip information when possible. If the system does not retrieve your previous card or you are not confident the edit saved, submit a new TDAC.

Arrival date is wrong

Use the date you arrive in Thailand, not necessarily the date you leave your home country. Long-haul trips often cross time zones, so travelers flying overnight should check the landing date on the itinerary.

Hotel or address changed

Update your accommodation information before travel. If you are staying in more than one place, use the address where you will stay first after entering Thailand.

You are entering by land or sea instead of air

The TDAC applies to foreign travelers entering Thailand by air, land, or sea. If your mode of travel changes, make sure the arrival details match the actual route you will use.

What If You Did Not Receive the TDAC QR Code?

The TDAC confirmation and QR code are normally sent to the email address used in the submission. If you did not receive it, first check spam, junk, promotions, and any alternate inbox you may have entered by mistake.

If you still cannot retrieve it, the official FAQ advises travelers to contact an immigration officer at the entry checkpoint. If you are still before travel and believe the email was entered incorrectly, submitting a new TDAC with the correct email is often the simplest way to make sure you have a usable confirmation.

Checklist Before You Update or Submit Again

Before you open the TDAC form again, gather every detail in one place. The official FAQ says the form takes only a few minutes per person when the information is ready, but it does not let you save progress and finish later.

How Close to Travel Can You Fix a TDAC?

The official guidance says foreign travelers should submit the arrival card information within the 3-day advance window before arrival in Thailand, including the arrival date. If you notice a mistake inside that window, correct it as soon as possible.

Last-minute corrections are stressful because you may be juggling airport check-in, Wi-Fi issues, and boarding deadlines. For most travelers, the calmest approach is to complete or review the TDAC the day before departure and save the latest QR code where it is easy to find.

When TDAC Assistance Is Worth It

Many travelers can correct or resubmit the TDAC themselves. Assistance can still be useful if you are traveling within 24 hours, applying for family members, dealing with multiple passport details, or trying to avoid repeat errors before a long international flight.

The official TDAC submission is free on the government website. Our service is a private assistance option for travelers who want help preparing, reviewing, and submitting their information accurately.

Frequently Asked Questions