Declaring a value or tariff heading that the supporting file does not back up
How to avoid it: Keep the sale contract, commercial invoice and payment evidence mutually consistent — a post-clearance audit reviews exactly that bundle.
Logistics, customs and trade paperwork: which authority issues what, and how a foreign document must be certified
This page is not a tariff-classification table. It answers the questions importers and exporters actually get stuck on: who issues each document, what it proves, and how many certification layers a foreign-issued document must pass before a Thai authority or Thai counterparty accepts it. Read from the Customs Act B.E. 2560 (2017) and the Export and Import of Goods Act B.E. 2522 (1979). No fees quoted, no outcome warranted.
This section quotes no fee and warrants no authority's decision. Ask our staff for service fees and timing by phone, LINE or email.
Who issues which document, and what that document actually proves
The most common failure is requesting the document from the wrong body. This table pairs the issuer with the issue the document proves.
| Document | Issued by | Proves |
|---|---|---|
| Import / export goods declaration | Filed by the trader with the Customs Department electronically | The declared description, quantity, value and tariff heading |
| Certificate of origin (C/O, Form D/E, etc.) | Department of Foreign Trade or an authorised body | Origin, for claiming preferential duty under a trade agreement |
| Import / export licence for controlled goods | Department of Foreign Trade or the sector regulator for that good | Legal entitlement to move a good that sits on a control list |
| Bill of lading or air waybill | The carrier or its agent | The contract of carriage and the right to take delivery |
| Power of attorney to a customs broker | The trader (a private instrument) | The agent's authority to sign and clear on the trader's behalf |
| Corporate certificate of a foreign counterparty | The company registrar of that country | The company's existence and who may sign to bind it |
How many layers a foreign document must pass before it is usable in Thailand
Thailand still runs the classic legalisation chain; the Apostille Convention enters into force for Thailand on 28 February 2027.
| Step | Where | What this step attests |
|---|---|---|
| 1. Signature or true-copy certification | A notary public or authorised officer in the country of origin | That the signer is who they claim to be, or that the copy matches the original |
| 2. Authentication by the origin country's central authority | That country's foreign ministry | The authority of the officer who signed at step 1 |
| 3. Thai embassy or consulate legalisation | The Thai embassy or consulate in that country | The signature and seal applied at step 2 |
| 4. Thai translation and translation certification | A translator who takes responsibility for the text, then onward certification | That the translation corresponds to the original |
| 5. Department of Consular Affairs legalisation | Legalisation Division, Department of Consular Affairs | Certifies the document or translation for filing with Thai authorities |
Statutory windows that are hard to recover once missed
The figures come from the statute. Confirm with the Customs Department before acting, because implementing regulations change.
| Matter | Window | Basis |
|---|---|---|
| Appeal against a duty assessment | File within 30 days of receiving the assessment notice, to the Board of Appeal | Customs Act B.E. 2560, s.44 |
| Post-clearance audit | Officials may reassess within 3 years of the declaration date, extendable as the Act allows | Customs Act B.E. 2560, s.63 |
| Goods left in customs custody | There is a period to remove the goods; otherwise the overstayed-goods procedure applies | Overstayed-goods provisions, Customs Act B.E. 2560 |
| Retroactive preferential-duty claim | Governed by the conditions of the specific trade agreement and Customs regulations | The relevant FTA plus Customs Department notifications |
8 practical cautions before you file
Letting the 30-day appeal period lapse
How to avoid it: Log the receipt date immediately and start collecting supporting documents before deciding whether to appeal.
Filing a foreign document with only a notary's seal on it
How to avoid it: A notary is only step one; the origin foreign ministry, the Thai mission, then translation and consular legalisation follow. An Apostille is not usable for Thailand until 28 February 2027.
A power of attorney drafted too broadly or too narrowly
How to avoid it: Match the scope to the actual work — filing declarations, paying duty, taking delivery, signing applications — and set an expiry date.
Claiming FTA relief when the C/O does not match the declaration
How to avoid it: Reconcile exporter, consignee, description and quantity on the C/O against the declaration before filing.
Translating without naming who is accountable for the text
How to avoid it: Any translation heading into legalisation needs a named translator's certification, or it stalls at the next step.
Leaving goods in customs custody until they become overstayed goods
How to avoid it: Plan the pickup date before arrival and secure any control-list licence in advance.
Assuming one regulator's licence covers every item in the shipment
How to avoid it: Different control lists sit with different regulators; check the packing list line by line before loading.
13 real search topics across 4 clusters
Customs clearance paperwork
The searcher is assembling a document set for clearance
- import declaration required documents Thailand
- customs broker power of attorney Thailand
- certify foreign company documents for import
- certified translation import export documents
Origin and preferential duty
The searcher wants FTA duty relief
- where to obtain certificate of origin Thailand
- what is Form D used for
- documents needed to claim FTA preference
Duty disputes and appeals
The searcher has received an assessment and is weighing an appeal
- customs duty assessment appeal 30 days Thailand
- customs post clearance audit period Thailand
- foreign documents as evidence in customs cases
Cross-border corporate paperwork
A foreign counterparty asks for certified Thai documents, or the reverse
- notary certification of export documents Thailand
- certified copy of company certificate for overseas use
- consular legalisation of trade documents Thailand
12 self-contained questions and answers
How long do I have to appeal a customs duty assessment?
Section 44 of the Customs Act B.E. 2560 requires an appeal to the Board of Appeal within 30 days of receiving the assessment notice. Start assembling supporting documents the day the notice arrives, and confirm current procedure with the Customs Department.
How far back can Customs review a shipment after release?
Section 63 allows reassessment within three years of the declaration date, extendable on the conditions set out in the Act. Importers should therefore retain the complete document bundle throughout that period.
How must a foreign counterparty's company certificate be certified for use in Thailand?
In sequence: a notary or authorised officer in the origin country, then that country's foreign ministry, then the Thai embassy or consulate, then a certified Thai translation, then legalisation at the Department of Consular Affairs. An Apostille becomes usable for Thailand when the Convention enters into force on 28 February 2027.
Where is a certificate of origin obtained?
For exports from Thailand, certificates of origin are issued by the Department of Foreign Trade or a body it authorises — not by Customs. The form used depends on which trade agreement you are claiming under.
Does a customs broker power of attorney need notarisation?
A power of attorney executed in Thailand by a signer present in Thailand normally does not need a notary. Where the principal is a foreign entity or the signer is abroad, counterparties usually require signature certification and the legalisation chain set out above.
If the original is in English, is a Thai translation still required?
It depends on the receiving body. Filings with Thai government agencies or Thai courts typically require a Thai translation with a named, accountable translator. Ask the receiving body which form of translation it accepts before you commission it.
How do I know whether a good needs an import licence?
Control lists derive from the Export and Import of Goods Act B.E. 2522 plus sector-specific notifications — food, medicines, medical devices, hazardous substances and so on. Check both the general list and the product-specific statute.
Can a foreign judgment or official document be used as evidence in a Thai customs dispute?
Foreign official documents can serve as evidence once they have passed the legalisation chain and carry a Thai translation. A foreign court judgment, however, is not directly enforceable in Thailand; proceedings must be brought under Thai procedure.
How long should import and export records be kept?
At minimum, cover the reassessment window under s.63, and bear in mind that accounting and tax record-retention rules may require longer.
What is required for a Thai-issued document to be used by a foreign customs authority?
Typically: certification of the signature or copy in Thailand, translation into the language the destination requires, legalisation at the Department of Consular Affairs, then legalisation at that country's embassy in Thailand. Always confirm the sequence with the receiving authority first.
If the broker makes a mistake, is the importer still liable?
Granting a power of attorney does not transfer the importer's statutory customs responsibility. The importer remains the declarant; liability between importer and broker is a matter of their contract.
How do I ask about fees for certifying and translating trade documents?
Contact our staff by phone, LINE or email with the document type, the origin or destination country, and the authority you will file with, so the sequence can be scoped to your case.