Asia-Pacific recorded 331 million international arrivals in 2025, up 6 percent from the year before, according to UN Tourism’s World Tourism Barometer. Some of that growth is now showing up before travelers reach the airport, in the form of digital arrival forms, biometric gates and shorter visa-free windows that didn’t exist a few years ago. Thailand, Vietnam, Singapore and Indonesia have each rebuilt their entry paperwork around a phone and a QR code, and each did it differently: different portals, different filing windows. A traveler who assumes one country’s rules apply to the next stop on the itinerary is usually the one stuck at a side desk re-filing a form. Here is what changed in each country, and what to check before booking a flight.
Passport rules still trip people up
Most Southeast Asian destinations ask for six months of passport validity beyond the entry date, and a name that matches exactly what’s printed in the passport’s machine-readable zone. A missing middle name, or an arrival date listed one day off after an overnight flight, is one of the more common reasons a digital arrival form gets rejected at the border, according to guidance from Thailand’s immigration authorities and similar notes from other regional agencies. Blank passport pages matter less than they used to, since most of the region has moved its entry records online. A passport nearing its expiry date still causes problems well before immigration, though: airline check-in staff are trained to catch it first, and a boarding pass with a name that doesn’t match the passport exactly can hold up check-in on its own. A middle name dropped from a booking site, or a surname split across two fields, is a small mistake that often only surfaces at the check-in counter.
Thailand’s arrival card and its shrinking visa-free window
Thailand replaced its paper TM6 arrival card with the Thailand Digital Arrival Card (TDAC) on 1 May 2025, and the requirement now applies to every foreign national entering by air, land or sea. The form is filed directly through Thailand’s immigration system, and the Thai Immigration Bureau won’t accept a submission earlier than 72 hours before arrival. Each entry needs its own card, so a traveler doing a border run to Laos or Cambodia (a common move to reset a visa clock) files again on the way back. A confirmation QR code is scanned on arrival.
Thailand’s cabinet approved a cut to its visa exemption on 19 May 2026, trimming the blanket 60-day stay to 30 days for most nationalities and 15 days for three others, according to the Tourism Authority of Thailand’s newsroom. As of this writing, the change is still pending publication in the Royal Gazette and takes effect 15 days after that, so the 60-day allowance remains in force at the border for now. Travelers should check the gazette date before assuming which rule applies to their trip. Proof of onward travel and roughly 20,000 baht in funds per person can also be requested, though enforcement varies by checkpoint.
Automated gates remain limited by nationality
Suvarnabhumi, Phuket and Don Mueang airports have been expanding automated, facial-recognition border gates since March 2026, cutting processing time for eligible travelers. Access depends on holding a biometric passport and on nationality, so it’s worth checking before counting on the faster lane. A traveler who doesn’t qualify still clears immigration through a staffed counter using the same TDAC QR code, so being ineligible for the automated lane doesn’t mean filing anything extra, just a longer line at busy times of day.
Vietnam’s online visa now covers every nationality
Vietnam’s online visa scheme was extended to cover all countries and territories in 2026, according to Vietnam’s immigration authorities. The fee is USD 25 for a single entry and USD 50 for multiple entries, and an approved visa allows a stay of up to 90 days. Processing typically takes about three business days, though it can run longer during busy periods. The application asks for a recent passport-style photo, 4x6cm on a white background, uploaded as a JPEG under 2MB, plus a passport valid for at least six months beyond arrival. The fee isn’t refunded if the application is rejected, which makes double-checking the uploaded photo and passport scan worth the extra few minutes before submitting. Some nationalities also keep a separate short visa-free allowance under bilateral agreements, which exists alongside the online visa system and doesn’t cancel it out, so a traveler eligible for both should check which one applies to the length of the trip. Multiple-entry online visas are common among business travelers who cross into Cambodia or Laos and back within the 90-day window, since re-applying for a single-entry visa each time would cost more in total.
Singapore requires its own arrival card
Singapore’s SG Arrival Card (SGAC) is not a visa, but nearly every visitor still has to file one. The card combines immigration and health declarations into a single online form, submitted through the SGAC e-Service or the MyICA mobile app, according to Singapore’s Immigration and Checkpoints Authority (ICA). It has to go in within three days of arrival, counting the arrival day itself. The main exemptions are transit passengers who don’t clear immigration, and Singapore citizens, permanent residents or long-term pass holders entering by land. Travelers who skip it can be turned away at the checkpoint, ICA warns, regardless of whether their visa or visa-free entry is otherwise in order. The form covers contact details, flight and accommodation information, and a short health declaration. Families traveling together can usually complete separate declarations in the same session, without starting over for each member, which cuts down the time spent filling in repeat information like a shared hotel address.
Singapore’s automated lanes work differently from Thailand’s. Any foreign visitor holding an ICAO-compliant passport can use them at the passenger halls without pre-enrolling biometrics, according to ICA. Thailand’s equivalent gates are still limited by nationality and passport type.
Indonesia merged its arrival paperwork into one form
Indonesia replaced its old paper customs declaration, including the version used for Bali, with the All Indonesia Arrival Card in August 2025. The new digital form folds immigration details, the customs declaration and the health pass once called Satusehat into a single submission, filed within 72 hours of arrival and accepted up to the day of landing. It’s compulsory for every international arrival, regardless of nationality, visa type or purpose of travel, and asks travelers to declare cash over IDR 100 million, plus items such as alcohol, tobacco and electronics, and to list countries visited in the previous 21 days. A QR code issued after submission gets scanned at the border. Visitors without an existing visa can pay for one on arrival instead: IDR 500,000, roughly USD 35, for a 30-day stay, either online in advance or at the airport in major currencies or by card. An in-person extension at an immigration office costs the same again. Land border crossings and cruise arrivals follow the same arrival card requirement as flights, though the form’s health-declaration fields trace back to the old Satusehat app that Bali introduced during the pandemic and later folded into this single system.
Funds and cash declarations travelers overlook
Proof of funds shows up in more than one of these systems, even when it isn’t part of the arrival form itself. Thailand can ask visitors to show roughly 20,000 baht per person, or 40,000 baht per family, though enforcement varies by checkpoint. Indonesia’s arrival card requires declaring cash brought into the country above IDR 100 million, roughly USD 6,000, regardless of currency or how it’s split across travelers. Neither threshold gets checked on every arrival, but officers can ask at random, and an undeclared amount over the limit becomes a customs issue, not an immigration one.
These forms aren’t just for arrivals by air
It’s easy to assume a digital arrival form only matters at an airport, but three of the four systems apply regardless of how a traveler crosses the border. Thailand’s TDAC covers land and sea entries as well as flights, which matters for anyone crossing from Malaysia by car or arriving by ferry. Indonesia’s arrival card works the same way for cruise passengers and land border crossings into Kalimantan from Malaysia. Vietnam’s online visa dropped its port-of-entry field in late 2025, according to Vietnam’s immigration authorities, so a current online visa can be used at any of the roughly 83 approved international checkpoints (13 airports, 16 land border gates and a group of seaports for cruise arrivals) without declaring the entry point in advance.
The four systems don’t share a fee or a filing window, which makes them easy to mix up on a multi-country trip.
What happens when a form is late or wrong
A rejected or missing form rarely cancels a trip, but it does add time at the border. Travelers who arrive in Thailand without a valid TDAC are sent to a side counter to file on the spot, according to guidance from Thailand’s immigration authorities, which can mean a long wait during peak arrival hours. Singapore’s ICA states plainly that a missing SGAC can mean being turned away at the checkpoint, even when a visa or visa-free entry is otherwise valid. Indonesia’s arrival card feeds directly into customs processing, so an incomplete declaration can trigger a manual bag check that a correctly filed form would have skipped. Vietnam’s online visa carries a different risk: a blurry uploaded photo or a passport scan that cuts off the machine-readable zone is a common reason applications come back for resubmission, which eats into the three-day processing window and can push a filing past the point where it clears before departure. Filing early helps. So does double-checking the passport details before boarding.
Filing four systems on one trip
None of this is unique to Southeast Asia. The EU’s Entry/Exit System went fully live on 10 April 2026, recording biometric data at the border instead of passport stamps, according to the European Commission. The bloc’s ETIAS travel authorization is due in the last quarter of 2026 at a cost of €20. The UK’s ETA now costs £20 per application after an April 2026 fee increase, per the UK Home Office. Each system, EES, ETIAS and the UK’s ETA, has its own portal and its own rules. A trip through Thailand, Vietnam, Singapore and Indonesia alone means four different forms and four different portals to track before a single flight departs. Add a stop in Europe or the UK on the same itinerary, and a traveler is filing six separate systems across two very different regions, each with its own idea of how far in advance a form can go in.
Managing several of these systems on one trip is where Travel Smart Travel Fast, a U.S.-based travel document assistance platform, comes in. One account handles the digital pre-arrival requirements across destinations for more than 15 countries. It guides travelers field by field so the details match the passport, and checks each submission against the destination’s current rules before filing. It also tracks deadlines so a form isn’t sent too early or too late, and updates automatically when a country changes a fee or a date. For a traveler flying from Bangkok to Ho Chi Minh City to Singapore to Bali in the same trip, that means one place to enter passport details once and file each country’s form on its own schedule, instead of four separate logins and four separate countdowns to remember.
Each government issues its own document directly. Travel Smart Travel Fast doesn’t issue any of them. It keeps the paperwork organized for travelers moving through more than one of these systems on the same trip, with confirmations and QR codes stored in one place if something needs checking later.
Before booking the next Southeast Asia itinerary, check the passport’s expiry date and confirm which form applies at each stop. Note the filing window too, so nothing goes in too early or too late.
Common questions about Southeast Asia’s entry paperwork
Is Thailand’s TDAC the same as a visa?
No. The TDAC is an arrival declaration, not a visa, and filing it doesn’t grant any right to enter the country on its own. Travelers still need to meet whatever visa or visa-exemption rules apply to their nationality, and file the TDAC separately within 72 hours of arrival. Immigration officers check both at the counter, and having one without the other is treated the same as having neither.
How far in advance can Vietnam’s online visa be filed?
There’s no fixed opening window like Thailand’s or Singapore’s arrival cards. Processing typically takes about three business days, so applying at least a week before departure leaves room for delays during busy periods, according to Vietnam’s immigration authorities. Applying earlier than that generally isn’t a problem, since the approved visa carries a validity period instead of a single fixed travel date.
What happens if a traveler misses Singapore’s SG Arrival Card?
Singapore’s Immigration and Checkpoints Authority states that travelers without a valid SGAC can be denied entry at the checkpoint, regardless of an otherwise valid visa or visa-free status. Filing takes a few minutes and can be done up to three days before arrival, and it can also be completed from within the transit area for travelers connecting through Changi on a tight schedule.
Does Indonesia’s arrival card replace the visa-on-arrival fee?
No. The All Indonesia Arrival Card is a declaration covering immigration, customs and health details, separate from any visa cost. The visa-on-arrival, where applicable, costs IDR 500,000, roughly USD 35, for a 30-day stay, and travelers who already hold a visa or qualify for visa-free entry still complete the arrival card regardless.
Can one account handle arrival forms for more than one country?
Government systems stay separate for each destination, since no single system covers all of Southeast Asia. Assistance platforms such as Travel Smart Travel Fast consolidate the process by guiding travelers through each country’s requirements from one account, without replacing the government forms themselves. The traveler still ends up with the same confirmation and QR code issued by each government.
Do these arrival cards apply to children and infants?
Yes, in most cases. Thailand’s TDAC, for example, requires a separate declaration for each traveler including infants, though family members can often be added within the same application session. The same applies to Singapore’s SGAC and Indonesia’s arrival card, where a parent typically completes one declaration per passport instead of a single form covering the whole family.
Do these requirements change often enough to matter for a trip booked months in advance?
Yes. Thailand cut its visa-free stay in 2026 with roughly a month of formal notice before the Royal Gazette publication, and Vietnam removed its online visa port-of-entry requirement without a long lead time either. A form filed correctly six months before departure can still be affected by a rule that changes closer to the travel date, which is why checking each country’s requirements again shortly before the trip is worth the extra few minutes.
Is travel insurance required alongside these arrival forms?
None of the four countries currently make travel insurance a condition of entry tied to the arrival form itself. Some airlines and accommodation bookings ask for it separately, and it’s worth carrying proof of coverage given the health-declaration fields built into Singapore’s and Indonesia’s systems, but it isn’t checked as part of the TDAC, the Vietnamese online visa, the SGAC or the All Indonesia Arrival Card.
Check the passport dates first. Then file the right form for each stop, and keep the QR code on hand for arrival.
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