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What information should I put for the Country/Territory boarded, flight number, and visa number in the TDAC form when coming to Thailand?

Aug 5, 2025
24 days ago
Greetings.

TDAC Questions:

1. When I fill in the Country/Territory where you boarded field, do I put the country I'm departing from or the last country I'm arriving from in Thailand (since I have a connecting flight)?

2. Related to that, the flight number field is the one from the country I'm leaving from or the last flight I'm taking to Thailand?

3. In the visa number field, do I put the number of the last visa extension (Non O visa extension based on marriage), or the visa number that is from two years ago, a sticker from Laos (btw, the extension is on that visa)?

Thank you.
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TLDR : Answer Summary
This post addresses questions regarding how to fill out the TDAC (Thailand Declaration Arrival Card) form when entering Thailand, particularly about listing the country of boarding, the flight number, and the visa number. Multiple comments suggest that when filling out the form, travelers can use the departure country of their last flight or the last country they were in before arriving in Thailand, as it is not strictly enforced. Furthermore, the flight number can correspond to either the departing flight or the last flight taken to Thailand, and the visa number field is not mandatory and can often be left blank.
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.in.th)

Mark ********
When it first came in it was advised to put the origin country as the one you started from eg manchester uk. The flight number would be the one you landed in Bangkok in my case the doha flight.
Graham ******
@Mark *******
That makes sense to me too, the country you last used your passport to leave and the arrival flight in Bangkok. With connecting flights you don't leave airside.
Wolf ******
I put the last flight arriving in Thailand....(exemple Doha when connecting flight from Doha to TH).

The visa number and departure flight are optional, you could leave it blank. Only the red asterix * are mandatory.
Heather ***************
I use the flight I arrived on and its departure country.
Brett *********
@Heather **************
yup. It isn't that hard is it? But as Tod says, they don't really give a shit as long as you have your boarding pass and passport on arrival at IO desk.
Tod *********
𝟭. 𝗪𝗵𝗲𝗻 𝗜 𝗳𝗶𝗹𝗹 𝗶𝗻 𝘁𝗵𝗲 𝗖𝗼𝘂𝗻𝘁𝗿𝘆/𝗧𝗲𝗿𝗿𝗶𝘁𝗼𝗿𝘆 𝘄𝗵𝗲𝗿𝗲 𝘆𝗼𝘂 𝗯𝗼𝗮𝗿𝗱𝗲𝗱 𝗳𝗶𝗲𝗹𝗱, 𝗱𝗼 𝗜 𝗽𝘂𝘁 𝘁𝗵𝗲 𝗰𝗼𝘂𝗻𝘁𝗿𝘆 𝗜'𝗺 𝗱𝗲𝗽𝗮𝗿𝘁𝗶𝗻𝗴 𝗳𝗿𝗼𝗺 𝗼𝗿 𝘁𝗵𝗲 𝗹𝗮𝘀𝘁 𝗰𝗼𝘂𝗻𝘁𝗿𝘆 𝗜'𝗺 𝗮𝗿𝗿𝗶𝘃𝗶𝗻𝗴 𝗳𝗿𝗼𝗺 𝗶𝗻 𝗧𝗵𝗮𝗶𝗹𝗮𝗻𝗱 (𝘀𝗶𝗻𝗰𝗲 𝗜 𝗵𝗮𝘃𝗲 𝗮 𝗰𝗼𝗻𝗻𝗲𝗰𝘁𝗶𝗻𝗴 𝗳𝗹𝗶𝗴𝗵𝘁)?

They don't care in the least put what ever country you want to

𝟮. 𝗥𝗲𝗹𝗮𝘁𝗲𝗱 𝘁𝗼 𝘁𝗵𝗮𝘁, 𝘁𝗵𝗲 𝗳𝗹𝗶𝗴𝗵𝘁 𝗻𝘂𝗺𝗯𝗲𝗿 𝗳𝗶𝗲𝗹𝗱 𝗶𝘀 𝘁𝗵𝗲 𝗼𝗻𝗲 𝗳𝗿𝗼𝗺 𝘁𝗵𝗲 𝗰𝗼𝘂𝗻𝘁𝗿𝘆 𝗜'𝗺 𝗹𝗲𝗮𝘃𝗶𝗻𝗴 𝗳𝗿𝗼𝗺 𝗼𝗿 𝘁𝗵𝗲 𝗹𝗮𝘀𝘁 𝗳𝗹𝗶𝗴𝗵𝘁 𝗜'𝗺 𝘁𝗮𝗸𝗶𝗻𝗴 𝘁𝗼 𝗧𝗵𝗮𝗶𝗹𝗮𝗻𝗱?

They don't care in the least put what ever flight you want to

𝟯. 𝗜𝗻 𝘁𝗵𝗲 𝘃𝗶𝘀𝗮 𝗻𝘂𝗺𝗯𝗲𝗿 𝗳𝗶𝗲𝗹𝗱, 𝗱𝗼 𝗜 𝗽𝘂𝘁 𝘁𝗵𝗲 𝗻𝘂𝗺𝗯𝗲𝗿 𝗼𝗳 𝘁𝗵𝗲 𝗹𝗮𝘀𝘁 𝘃𝗶𝘀𝗮 𝗲𝘅𝘁𝗲𝗻𝘀𝗶𝗼𝗻

It's not a mandatory field leave it blank 😛
Немања **********
ORIGINAL POSTER
@Tod ********
thanks man! Always very helpful! 👍🏻
Tod *********
sorry that sounds so dismissive but honestly, the 'powerz-that-b' don't care at all
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