With the exact regex the official site enforces, the error message it returns, and what you probably did wrong. Pre-check your values in the TDAC page's local validator before pasting.
The string next to "Passport No." on the photo page. Letters and digits only, up to 20; no spaces, no dashes. Do not use the two long rows of letters and digits at the bottom of the page — that's the MRZ, not your passport number.
^[A-Z0-9]{1,20}$
max 20Given names in Latin letters, exactly as printed. Max 60 characters, letters A–Z and spaces only. A separate Middle Name box is optional; the site's own passport scan puts every given name in First Name and leaves Middle Name empty.
^[A-Za-z ]+$
max 60Optional, up to 60 characters, letters A–Z and spaces only. Leave it empty if you keep every given name in First Name, which is what the site's own passport scan does. Only names printed on the photo page belong here.
^[A-Za-z ]+$
max 60Surname, as printed, up to 60 characters, letters A–Z and spaces only. A hyphen becomes a space, the way the MRZ line writes it (SMITH<JONES). No family name on the passport? Type a single - , as the form's own hint says. Include suffixes (JR, III) only if printed on the photo page.
^([A-Za-z ]+|-)$
max 60Three boxes on the form, in this order: year (yyyy), month (mm), day (dd). The month and day boxes open once the year is in. The pre-check above takes the same date as YYYY-MM-DD. Date of birth cannot be changed later with Update Arrival Card.
Flight No./Vehicle No., up to 20 characters. Spaces are accepted. By air, the flight number on your ticket; by land, the vehicle number. On a codeshare ticket ("operated by X, marketed as Y"), use the operating carrier's number.
The date you actually land in Thailand, in Thailand local time. Red-eye trap: if you depart JFK at 11pm May 12 and land in Bangkok at 1am May 14 local, the arrival date is May 14 (the TDAC date box shows 2026/05/14). The box accepts today through 3 days ahead.
Asked once, on the last step after the preview, for the whole submission. Max 50 characters, one address. The card with its QR code arrives here. If nothing comes, check spam and download the PDF from the confirmation screen; the official FAQ says to contact the Immigration Officer at the entry checkpoint.
Required on the current form, in two boxes: Code (up to 10 digits) and Phone No. (up to 25). Digits only, no + or spaces. The Code fills in from your Country/Territory of Residence. Typed it wrong? The phone is not a locked field, so fix it with Update Arrival Card.
^\d+$
max 25No photo upload
The official form has no photo or passport image upload. A site that asks for your face photo for this form is not the official form.
Source: tdac.immigration.go.th ↗ · Checked 2026-10-19
"This field is required."A required box is empty. Family Name counts: type - if your passport has none. Code and Phone No. are both required.
"Invalid format."A character or value the box does not take: hyphen or accent in a name, space in the passport number, + in the phone, over 20 characters in Flight No., an email with a space or over 50 characters, or an arrival date beyond 3 days.
"Http failure response … 429 OK"Listed in the official FAQ as an error after submitting. Refresh the page and try again.
"Http failure response … 0 Unknown Error"The official FAQ says check that you are connected to the internet.
"No confirmation email"Check spam and download the card from the confirmation screen. The official FAQ says contact the Immigration Officer at the entry checkpoint. A new submission is allowed; the latest one counts.
The official site shows a confirmation on screen. Screenshot it — that's your backup.
Within a few minutes from a go.th address, with the record details.
Show the QR code and your passport. Officer scans, stamps, hands it back. Under 30 seconds.
Screenshot is fine. PDF is fine. Even the email app open on your phone is fine.
Rare. Officer looks you up by passport number — your record is already in the system.
If you still need these for the trip, the links below support entrycardguide without changing the price you pay.
Affiliate disclosure: if you buy through one of these links, we may earn a commission. We never accept money from visa middlemen, form-filing services, or companies that compete with the official government forms we point to.
This guide covers the TDAC fields people get wrong most often. The official form runs in three steps, Personal Information, Trip & Accommodation Information and Health Declaration, then a preview where you enter your email and submit. Field rules below were checked against the live form (version 2026.09.00) and the official user guide on 2026-10-15. Pre-check your entries with the tool below before you type them into the official site.
Type your details below. We never send them anywhere. This runs 100% in your browser. View source to verify.
Your answers above, cleaned up for pasting, in the order of this guide. Nothing is saved or sent. Close the tab and it's gone.
Before you submit, check your name, passport number, nationality and date of birth against your passport. Some forms don't let you change them afterwards.
We don't fill in forms for people, and you don't need to pay anyone to. The official form is free and usually takes under ten minutes. Fill in the fields above, make a copy sheet, then paste each value into the official form.
Have your passport open to the photo page. Every value in this section comes off that one page. Copy it exactly. No creative spelling.
The site’s Retrieve with Passport button can read the MRZ from a camera scan or an uploaded photo and fill in your name, passport number, nationality and date of birth. The official guide asks you to recheck everything it fills in.
The string printed next to “Passport No.” or “Passport No./No. de passeport” on the photo page.
A 1234567, type A1234567. Lowercase is fine; the site turns it into capitals.JOHN QUINCY in First Name is fine. Either way, type only the names printed on the photo page.José or Müller gets “Invalid format.” Use the spelling in the passport’s MRZ row, which is always ASCII: JOSE, MUELLER or however your MRZ writes it.Your surname, exactly as printed on the passport. On the form it comes before First Name.
SMITH-JONES gets “Invalid format.” Type SMITH JONES: the MRZ line writes it SMITH<JONES, with the same separator it uses between words.-. That is the form’s own hint, and the passport scan does the same when it finds only one name, putting that name in First Name.JR or III: include them only if they appear on the passport.Three boxes, in this order: year (yyyy), month (mm), day (dd). Type or pick each value from the list that appears. The month and day boxes open once the year is in.
1991, 08, 22. Not day first.YYYY-MM-DD.TG312 and TG 312 both go through. Type it as your ticket shows it.OTHERS (PLEASE SPECIFY) as Mode of Transport, you describe the transport in a text box instead (letters and spaces, up to 50 characters) and this box becomes optional.XL8842A). Include the suffix.The date you actually land in Thailand, in Thailand local time. The form uses a date picker, and the box shows the date as yyyy/mm/dd. The tool above takes it the same way and flags a date outside the window.
These two are on different steps. The phone boxes are on the Personal Information page. The email comes last, after the preview.
After you review the preview, the form asks you to “specify an email to send Thailand Digital Arrival Card”. It asks once per submission, so a group of up to 10 travelers gets one email. Pick an address you can open on the phone you will actually have in the airport.
Required on the current form, in two boxes: Code and Phone No. Both take digits only.
+, spaces, dashes or brackets. A US number +1 415 555 0100 goes in as Code 1 and Phone No. 4155550100.The Health Declaration step asks for the countries or territories where you stayed within two weeks before arrival. The official user guide says the system asks for more only if one of those countries, the country where you boarded, your nationality or your flight is on the Ministry of Public Health’s list. Then it asks:
It may then tell you to go to the Department of Disease Control counter before the immigration checkpoint. Answer truthfully. The official FAQ says passengers who give incorrect information may be refused entry at immigration’s discretion.
Last checked against the official user guide and the live TDAC form: 2026-10-15. If the form has changed when you read this, trust the live site, not this page, and email us so we can update.
Checked against the field rules in the live TDAC form (version 2026.09.00) on 2026-10-15. The option lists for Purpose of Travel and Mode of Transport load only after the site’s human check, so this page does not copy them. The official user guide asks for every detail in English.
A free-text box on the Personal Information page, not a dropdown. It is required.
TEACHER, NURSE, SOFTWARE ENGINEER, RETIRED.The country where you live now. It can differ from your passport: a Chinese citizen living in Singapore picks Singapore.
CODE: NAME, for example USA: THE UNITED STATES OF AMERICA.Opens once the country is chosen. Required.
SHANGHAI, not 上海.A required dropdown on the Trip & Accommodation page.
OTHERS (PLEASE SPECIFY) and type the purpose in English. Letters and spaces only, max 100 characters.From the official user guide and FAQ, read 2026-10-15.
The official FAQ does not single out the phone number. It does say a submission must be accurate before entry, and that passengers with incorrect information may be refused entry at immigration’s discretion. The phone number is not one of the locked fields, so correct it with Update Arrival Card.
no-reply@tdac.immigration.go.th. It contains the same QR code as a PDF attachment.If the QR will not scan (rare, usually a glare issue), the officer can look up your record by passport number. The form is already in their system the moment you hit submit.
The TDAC shows the same few messages under every box. These are the ones in the live form’s code, plus two connection errors the official FAQ names.
“This field is required.”
A required box is empty. Family Name counts: type - if your passport has none. Code and Phone No. are both required, and so is Flight No./Vehicle No. unless you chose OTHERS (PLEASE SPECIFY) as Mode of Transport.
“Invalid format.”
The box got a character or a value it does not take. Common causes: a hyphen, apostrophe or accent in a name; a space or dash in the passport number; + or spaces in the phone boxes; more than 20 characters in Flight No./Vehicle No.; an email with a space or over 50 characters; an arrival date outside today to 3 days ahead.
“Http failure response … 429 OK” The official FAQ lists this one after submitting and says refresh the page and try again.
“Http failure response … 0 Unknown Error” The official FAQ says check that you are connected to the internet.
No confirmation email Check spam, and download the card from the confirmation screen. The official FAQ says to contact the Immigration Officer at the entry checkpoint if the QR code email never arrived. A new submission is also allowed; the most recent one is the one that counts.
Each destination has its own entry process. Check the guide for your next border crossing.