Thailand TDAC for Families and Groups: Children, Email, Passport Details

Thailand Digital Arrival Card (TDAC) group submission lets a family or travel group enter up to 10 traveler records in one submission. TDAC is generally required for non-Thai nationals entering Thailand; the official FAQ exempts crew and transit passengers who do not pass through immigration. It also says infants and children need TDAC.

TL;DR: Use the official TDAC portal at tdac.immigration.go.th during the 3-day period before arrival, including the arrival date. Create one traveler record per person, including infants and children. A group submission can contain different traveler details; use "Same as Previous Traveler" only when the travel and accommodation details really match. Check each passport number, full name, nationality, date of birth, arrival date, accommodation, and email before submitting.

Family TDAC Quick Checklist

Item	What to do	Common group mistake
Traveler records	Add one record for each adult and child	Copying one parent's passport number into a child's record.
Group size	Keep each submission within the official 10-entry limit	Starting a large tour group as one submission and running into the limit.
Shared trip details	Reuse flight and accommodation only when identical	Applying the first traveler's hotel to someone staying elsewhere.
Email	Use an inbox someone can access during travel	QR email goes to one organizer who is offline at arrival.
Identity fields	Check passport number, full name, nationality, and date of birth before submission	Trying to update fields that the official FAQ says cannot be updated later.
TDAC backup	Save each traveler's TDAC confirmation so it is easy to retrieve	Keeping only one unclear screenshot for the whole family.

Who Needs a Separate Record

For travelers who are required to submit TDAC, create a separate record for each person. That includes children, infants, elderly parents, and travelers in the same booking. A family submission groups records for convenience; it does not turn the family into one traveler.

Before you start, prepare:

passport details for every traveler;
full name as shown in the passport;
nationality or citizenship;
date of birth;
arrival date and mode of transport;
flight number or other transport details;
Thailand accommodation or address;
an accessible email address and any contact details requested by the form.

If a child has a different surname, a different passport nationality, or a different travel document from a parent, check that record separately instead of relying on copied family details.

How Group Submission Works

The official TDAC guide shows both individual submission and group submission. For group submission, enter the first traveler, then add the next traveler and repeat the traveler-detail steps. If travel and accommodation details are the same, the guide says you can use "Same as Previous Traveler" for the previous traveler.

Use that shortcut carefully. It is helpful for a family on the same flight and in the same hotel, but it is risky when:

one traveler arrives on a different flight;
one traveler stays at another hotel;
a child or dependent has different passport nationality;
part of the group enters by land while others fly;
an organizer changes the itinerary after some records have been added.

For more than 10 travelers, split the work into separate submissions and label the saved confirmations clearly.

Children, Shared Email, and QR Storage

Children still need their own traveler details. The adult can prepare the information, but the child record should use the child's passport number, name, nationality, and date of birth.

For email, use an inbox that can be checked during travel and arrival. If one parent or organizer enters an email for the group submission, download the TDAC documents returned by the system and keep each traveler's confirmation easy to retrieve. The official guide also says the documents can be downloaded or printed from the email provided.

Keep backups in more than one place:

each traveler's TDAC confirmation in the phone photo gallery or files;
a shared folder or trip folder with clearly named files;
a screenshot or printout for children and elderly travelers;
offline access in case mobile data or airport Wi-Fi fails.

Fields to Check Before Preview

The official FAQ says full name, passport number, nationality/citizenship, and date of birth cannot be updated through the update function. The guide also says all details must be entered in English. That makes the preview step especially important for families and groups.

Check these fields for every traveler:

full name exactly as shown in the passport;
passport number;
nationality or citizenship;
date of birth;
arrival date and transportation;
accommodation address;
email and any contact fields shown by the form;
health-related fields if the official form asks for them.

If a critical identity field is wrong, do not continue just because the other family records look correct. Fix the affected traveler record before submission.

If You Cannot Submit Before Reaching the Airport

The official FAQ says travelers without a smartphone or internet access can use provided kiosks and Wi-Fi on arrival. It currently lists kiosk installation points at Suvarnabhumi, Don Mueang, Phuket, Chiang Mai, and Hat Yai airports. When possible, submit during the official advance window so there is time to review every family member's record.

For a kiosk submission, the FAQ says the QR code is sent by email and travelers can also photograph the Digital Arrival Card shown by the kiosk. If no QR code arrives by email, contact the immigration officer at the entry checkpoint.

Where Reusable Profiles Help

Family and group TDAC work is repetitive because the same passport, flight, hotel, and contact fields appear again and again. eVisaFlow Southeast Asia can keep reusable traveler details and fill saved passport, trip, stay, and contact information on the Thailand TDAC official website after you run the extension.

It is most useful when:

a parent prepares TDAC records for several family members;
a group uses one flight and one hotel;
an agency prepares repeated arrival-card records for clients;
the same travelers also handle other Southeast Asia forms such as MDAC, SG Arrival Card, Cambodia e-Arrival, or Laos eVisa.