Everything you need to know about the TDAC and our service.
About the TDAC
The TDAC is a mandatory online immigration form introduced by Thai authorities in May 2025. It permanently replaces the old paper TM6 form. All foreign nationals entering Thailand by air, land, or sea must complete it before arrival.
Yes. Since May 1st 2025, the TDAC is mandatory for all foreign nationals entering Thailand regardless of visa type. Airlines now verify it at check-in. Without it you risk denied boarding or delays at Thai immigration.
The official government portal only allows submission within 72 hours of arrival. However you can apply through SiamEntry at any time — we submit at exactly the right moment and deliver your QR code within your chosen timeframe.
No. The TDAC is not a visa and does not replace one. It is a digital immigration declaration form required in addition to your visa or visa exemption.
Yes. The TDAC is valid for a single entry only. Every time you enter Thailand — even frequent visitors and long-term residents — you need a new one.
If you stay airside and do not pass through Thai immigration, you do NOT need a TDAC. If your transit requires clearing immigration, then yes you do need one.
About Our Service
The official Thai portal is free but travelers report it crashes, times out on mobile, rejects valid dates, and provides zero support when things go wrong. We charge a service fee for expert error review, guaranteed delivery timing, and real human support — cheap insurance for an expensive trip.
No. SiamEntry is an independent private assistance service and is not affiliated with, endorsed by, or connected to the Thai Government or Thai Immigration Bureau. The official free TDAC portal is tdac.immigration.go.th.
We guarantee delivery within your chosen window. If we miss it you get a full refund — no questions asked. Super Rush orders include an automatic money-back guarantee for any late delivery.
Yes. All payments are processed by Paddle, a leading payment processor. Your card details are encrypted and never stored on our servers. Paddle is PCI DSS Level 1 certified — the highest standard in the payment industry.
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