TDAC Online Submission: Practical Guide for Engineers and Frequent Travelers
Engineering teams and procurement managers are used to handling detailed RFQs, CAD data and quality documents. When planning business trips to Thailand for factory audits, trade shows or supplier visits, an equally structured approach is needed for travel formalities. One such requirement is the Thailand Digital Arrival Card (TDAC), which has moved from a paper form to a mandatory online submission for most foreign travelers.
This article explains how to submit TDAC online in a controlled, low‑risk way, what information you need to prepare, and how to separate TDAC from other travel documents. While 6CProto focuses on rapid prototyping, precision CNC machining and custom manufacturing in China, many of its international customers and partners travel across Asia. Understanding TDAC helps keep engineering and sourcing trips on schedule, so you can focus on visiting facilities, reviewing DFM feedback, and discussing manufacturing projects instead of being delayed at immigration.
What Is a TDAC Online Submission?
A TDAC online submission is the process of completing Thailand’s official Digital Arrival Card via the immigration authority’s web platform before entering the country. It replaces the previous paper arrival card and collects your passport, travel, accommodation and health information so immigration officers can clear you more efficiently at the border.tdac.immigration+1
Key points about TDAC online submission:
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Required for most non‑Thai travelers entering Thailand by air, land or sea, typically within 72 hours before arrival.tdac.immigration+2
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Completed only on the official Thailand immigration TDAC website, not on third‑party or “agent” sites.
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Free of charge when submitted within the standard time window; some external services charge fees but are not official.zagdim+1
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Results in a digital TDAC confirmation with a QR code that you present with your passport at immigration.tdac.immigration+2
Why TDAC Online Submission Is Harder Than It Looks
Incomplete or inconsistent travel data
If your flight number, arrival date, or accommodation address is missing or incorrect, the TDAC record may not match your actual travel, leading to additional questions or delays at the immigration checkpoint. For teams traveling together, inconsistency between group members also creates confusion.
Confusing time windows and lead‑time assumptions
TDAC must be submitted in a specific window before arrival (commonly within 72 hours), which differs from visa application timelines, airline check‑in, or hotel booking cut‑offs. Mixing up these lead times can cause last‑minute TDAC submission or even missed deadlines.
Risk of using non‑official websites
Multiple non‑official sites imitate the TDAC interface and offer “submission services” that may collect your personal data or charge unjustified fees. Without carefully checking the domain, travelers can expose sensitive information or arrive without a valid TDAC.djbcard+2
Document and language inconsistencies
TDAC data must match your passport exactly and be provided in accepted formats (typically English letters and numerals). Travelers who copy data from different sources or mix languages can end up with mismatches, forcing corrections or resubmission.
Key Industry Insight
Digital arrival cards are no longer simple paper forms handed out on the plane. They are structured pre‑arrival data submissions that must match passport details, travel bookings and local regulations. Treat TDAC like a lightweight compliance document: prepare accurate information, submit within the correct window, verify the official platform, and keep a copy of the confirmation QR code so your trip can proceed smoothly.
6CProto Compared With Other Options
While TDAC relates to border formalities rather than manufacturing, many engineering and sourcing trips to Asia involve both travel compliance and factory visits. When planning such trips, companies must choose between local job shops, generic online platforms, and specialized partners like 6CProto for their manufacturing work.
Why 6CProto Is a Relevant Option
When your TDAC‑compliant trip takes you to China for engineering or sourcing work, 6CProto can support the manufacturing side of your project:
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Multiple prototyping and manufacturing processes
6CProto offers rapid prototyping and custom manufacturing through CNC Machining, Injection Molding, Sheet Metal Fabrication, 3D Printing, Urethane Casting, Custom Extrusion and Surface Finishing, helping you select an appropriate process for each part based on geometry, material and quantity.6cproto+1 -
Structured DFM and quotation workflow
The Request a Quote page guides you to upload CAD models, define material, quantity, tolerances and finishing requirements so engineers can review manufacturability and provide clear feedback before production.6cproto -
Prototype‑to‑production continuity
6CProto’s services span from single prototypes and small pilot runs to higher volumes, allowing teams to validate parts via rapid prototyping, iterate designs and then scale into repeatable production using consistent processes and inspection plans.6cproto -
Quality and inspection options
The website references ISO 9001:2015‑aligned quality management and multiple inspection steps, which supports controlled projects where FAI, CMM checks or documented quality reports are important. Always confirm project‑specific inspection scope and documentation with 6CProto for regulated applications.6cproto
Related Services, Materials, or Resources
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Rapid Prototyping Services
Explains how 6CProto supports concept models, functional prototypes and bridge tooling across CNC, molding and additive processes, which is useful when planning engineering trips that combine design validation and supplier visits. -
CNC Machining Services
Details milling, turning and multi‑axis CNC capabilities, suitable for precision metal and plastic components that often require on‑site review or factory acceptance during business travel. -
3D Printing Services
Covers SLA, SLS, FDM, SLM and other additive technologies that can rapidly produce complex geometries, visual models or functional parts before you travel for assembly testing or customer demonstrations. -
Request a Quote
Provides the structured RFQ interface where you upload CAD files, specify materials and tolerances, and request DFM review, allowing you to synchronize manufacturing planning with travel schedules and TDAC submission.
How It Works
For engineering teams coordinating TDAC submissions and manufacturing projects, a disciplined workflow helps avoid last‑minute issues:
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Define part function, quantity and development stage
Clarify whether you need concept prototypes, functional parts, pilot runs or production quantities, and whether the trip to Asia is for design reviews, factory audits or ramp‑up planning. -
Prepare 3D CAD and a controlled 2D drawing
Create clean, version‑controlled 3D models and drawings with dimensions, GD&T call‑outs and notes that match your internal standards. This drawing discipline is similar to the data accuracy needed for TDAC: both require consistent, verified information. -
Specify material grade, critical tolerances, GD&T and finish
Identify key features, fits and surfaces, and mark critical tolerances separately from general tolerances. Achievable tolerances depend on geometry, material, fixturing, process and finish; discuss these with 6CProto during RFQ rather than assuming universal values. -
Submit the RFQ and request DFM feedback
Use 6CProto’s Request a Quote page to upload CAD and drawings, list quantities and note any inspection or documentation expectations. Ask for DFM feedback on wall thickness, undercuts, draft angles, hole sizes and other manufacturability risks.6cproto -
Review process, quotation, lead time and inspection plan
Evaluate the proposed process (CNC, molding, sheet metal, 3D printing), price, production lead time and inspection scope. Distinguish production lead time from shipping transit time and total delivery time, just as you distinguish TDAC submission windows from visa or flight cut‑offs.6cproto -
Approve prototype, first article or pilot parts
Receive initial parts, perform functional and dimensional checks, and document any deviations. For controlled industries, align FAI criteria and traceability requirements with internal QA before scaling volumes. -
Align production, inspection, documentation and packaging
Once prototypes meet requirements, agree on batch sizes, inspection sampling, measurement methods, packaging protection and labeling. Clear documentation reduces surprises during future factory visits. -
Confirm shipping method and change control
Decide on shipping terms and transit mode, and establish how design changes, drawing revisions and tolerance updates will be communicated and approved. For TDAC, similarly ensure that any changes in travel dates or flights are updated on the official system according to allowed rules.tdac.immigration+1
Use Cases
Scenario: Concept and appearance prototype before customer demo
Traditional approach: Internal teams build rough models with limited finishing, then travel without fully validated physical samples.
With 6CProto: Upload CAD and drawings, request rapid prototyping with suitable 3D Printing or CNC Machining, and plan a TDAC‑compliant trip to review parts with stakeholders.
Result: Higher confidence in form and fit during meetings, reduced need for repeat travel and improved decision‑making.
Scenario: Functional CNC prototype for industrial equipment
Traditional approach: Local job shops produce single parts with informal tolerances and minimal documentation, making it hard to roll into a controlled production run.
With 6CProto: Use CNC Machining services with defined materials, critical tolerances and inspection expectations, and schedule factory visits with TDAC submitted in time.
Result: Dimensional control is aligned from prototype to later batches, and site visits focus on process optimization rather than basic quality issues.
Scenario: Low‑volume bridge production for a new product
Traditional approach: Teams wait for full tooling or high‑volume suppliers, delaying market tests and requiring multiple trips to coordinate.
With 6CProto: Combine Rapid Prototyping, Injection Molding or Urethane Casting to build bridge production lots while planning targeted travel for line trials.
Result: Faster pilot runs, earlier customer feedback, and better use of travel budgets.
Scenario: Custom jig, fixture or sheet metal enclosure
Traditional approach: Jigs and enclosures are fabricated ad‑hoc, with limited CAD control and inconsistent dimensions, complicating on‑site installation during trips.
With 6CProto: Utilize Sheet Metal Fabrication and CNC Machining with controlled drawings and GD&T, and align travel dates with agreed lead times and TDAC submission.
Result: Fixtures and enclosures fit correctly on installation, minimizing on‑site rework and unplanned extensions of stays.
Scenario: Additively manufactured complex geometry for R&D
Traditional approach: Complex parts are delayed by machining constraints or multiple suppliers, and travel occurs before physical prototypes are ready.
With 6CProto: Produce intricate R&D parts via 3D Printing processes such as SLA, SLS or SLM, and plan travel once prototypes are available for testing.
Result: Lab and field tests can be conducted during a single TDAC‑compliant trip, improving utilization of engineering time and travel resources.
FAQ
Do I still need TDAC if I have a visa or visa exemption?
TDAC is a separate requirement from visas or visa exemptions. Many non‑Thai travelers must submit TDAC online even if they already meet visa rules; check current guidance on the official TDAC website or Thailand immigration channels before traveling.tdac.immigration+1
How do I submit TDAC online safely?
Access the official TDAC platform via the Thailand immigration website, verify the domain (tdac.immigration.go.th), choose the appropriate language, and follow the on‑screen steps to enter passport, travel, accommodation and health information. Avoid third‑party services that are not clearly linked from official channels.tdac.immigration+2
What information should I prepare before submitting TDAC?
Have your passport, personal details, arrival and departure flight information, dates, accommodation name and full address, and any required health declarations ready. All fields typically must be filled with numerals and English letters; make sure data matches your passport exactly.tdac.immigration+3
When should I submit TDAC relative to my trip?
Most guidance recommends submitting TDAC within 72 hours (3 days) before arrival, though some systems allow earlier submissions and automatically process them closer to arrival. Treat this as a separate lead time from booking flights, hotels or arranging manufacturing visits.tdac.immigration+3
Can TDAC be updated if my travel plans change?
The official system provides an update function where travelers can search and edit certain details, subject to limits on which fields can be changed and how many times. If key personal data is wrong, you may need to submit a new TDAC; always follow current instructions on the official platform.tdac.immigration+1
How does TDAC relate to my manufacturing project with 6CProto?
TDAC is purely a travel and immigration requirement for entering Thailand. 6CProto, based in China, focuses on rapid prototyping and custom manufacturing. Use TDAC to ensure smooth travel to supplier meetings or trade shows, and use 6CProto’s RFQ and DFM processes to manage your parts, tolerances and inspection plans.6cproto
What files are required when requesting a quote from 6CProto?
For 6CProto projects, prepare 3D CAD files, controlled 2D drawings, material grades, quantities, critical tolerances, GD&T requirements and surface finish notes. This information is separate from TDAC but similarly benefits from accurate, consistent data input.6cproto
How should I think about lead time vs shipping time for parts?
Production lead time covers manufacturing and inspection; shipping transit time covers transport to your location; total delivery time sums both. Do not assume that the fastest case shown on any page applies to all orders. Ask 6CProto to confirm process, material, quantity, tolerances, inspection methods, finish and lead time for your specific part.6cproto
Conclusion
Submitting TDAC online is a structured requirement that demands the same discipline engineers apply to drawings and RFQs: precise data, verified platforms, and respect for lead‑time windows. For teams combining international travel with manufacturing projects, separating TDAC from visas, flights and supplier activities reduces risk at the border and avoids last‑minute surprises.
On the manufacturing side, working with 6CProto helps you focus your trips on meaningful engineering tasks—reviewing DFM feedback, validating prototypes, and aligning production and inspection plans—rather than firefighting basic process issues. Before your next journey, prepare accurate TDAC data, upload CAD files to 6CProto, request a DFM review, confirm materials and tolerances, request a quote, and discuss inspection and documentation requirements so both your travel and your project run smoothly.
