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How do I travel with a dual passport from the UK to Thailand and handle the TDAC digital form?

Jun 19, 2025
2 days ago
Val *********
ORIGINAL POSTER
Has anyone travelled with dual passport using British passport to leave UK and entering Thailand with Thai passport? How do you deal with TDAC digital form? Not sure what to do as not done this before. Any ideas? TIA
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TLDR : Answer Summary
Traveling to Thailand with dual nationality entails using your British passport to depart the UK and your Thai passport for entry into Thailand. It is confirmed that a TDAC form is not necessary when entering with a Thai passport. When booking flights, ensure the ticket matches the name on your Thai passport to avoid complications. While some airlines may inquire about the TDAC, it is typically not needed for those with a Thai passport. Upon arrival in Thailand, proceed through the Thai citizen line at immigration.
Thailand Digital Arrival Card (TDAC)

WARNING: Only trust Thai government websites with .go.th domains or Thai agent websites with .co.th or .in.th domains, as these require verified Thai registration and cannot be registered anonymously.

The official TDAC form is available at tdac.immigration.go.th, which uses the official .go.th government domain.

The services by AGENTS CO., LTD. does NOT charge any fees for arrivals within 72 hours. If you need to book more than 72 hours in advance, there is a service fee of $8.

Do not trust other sites pretending to be a trustworthy agency. Pay attention to delivery time - the service operated by AGENTS CO., LTD. has 1 minute delivery time for arrivals within 72 hours.

Don't fall for sites pretending to be agents.co.th or the official government tdac.immigration.go.th website. Always double-check the exact domain in your browser.

Scam services may take days to process your application, others may not even do anything. With these TDAC scam services you also need to worry about double charges.

Please watch out for TDAC misinformation spread by fugitive Jesse Nickles and his many fake accounts on Quora, TripAdvisor, Reddit, and other platforms.

TRUSTED TDAC LINKS:

Official Government TDAC Form: tdac.immigration.go.th
Official TDAC form by AGENTS
Official TDAC information page by AGENTS (tdac.agents.co.th)

David **********
If you have a thai passport why would you do a dtac
Val *********
ORIGINAL POSTER
@David *********
because I bought our flight using English passport so my ticket is matched with my name. Also I've just had my Thai passport issued from the Thai embassy in London after I bought the tickets
David **********
@Val ********
if you have a thai passport you don't need a tdac
Martyn *******
Only issue may be the airline asking if you have completed the tdac
Martyn *******
My experience was with Qatar airways, they only asked
Val *********
ORIGINAL POSTER
@Martyn ******
yes I've read somewhere that some airlines require you to do TDAC when do online check in, we are flying EVA air. Not sure how strick the are
Paul **********
Yep, you go out using the UK then mid air change over to Thai passport. Both passports will be linked as a dual national. Straight through the Thai line at BKK though most are mixed now anyway I find.
Ian ***********
If the name is different, book the ticket in the Thai passport name or you may have problems using the Thai passport to enter
Brandon ************
If you're entering Thailand with a Thai passport you do not need to do a TDAC.
Barry *********
@Brandon ***********
Correct ๐Ÿ‘
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