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Thai Notary Law & Service Phuket
THAI NOTARY LAW
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MFA Legalisation, Embassy Attestation and the Apostille

The chain for corporate documents used abroad: DBD extract, translation, legalisation by the Legalization Division of the Department of Consular Affairs, destination-embassy attestation, and the Apostille effective for Thailand on 28 February 2027.

How recent must a DBD certificate be for a foreign authority to accept it?

Thai law sets no expiry date on a company extract, but in practice banks, counterparties, embassies and foreign company registries accept only certificates issued within the last three months, and some jurisdictions insist on one month. Always confirm the requirement with the recipient first and obtain a fresh certificate as close to the filing date as possible, because once the document has been translated and legalised the underlying extract cannot be swapped out without repeating the whole chain.

Can the DBD issue the company affidavit in English?

The Department of Business Development does issue English-language certificates for companies that have requested them, but not every register entry is available in English. Where it is not, the standard route is to obtain the Thai original, have a translator prepare the English version with a translator's certification, and then have the translation legalised by the Legalization Division of the Department of Consular Affairs. Either route is acceptable; the critical point is that the spelling of the company name and each director's name matches the passports and every earlier document exactly.

What must a board resolution contain if it will be used abroad?

The minutes should state the company name and registration number, the date, time and place of the meeting, the directors present and the quorum, the agenda, an unambiguous resolution saying exactly what is approved and who is authorised to do what, and the chairman's signature. For overseas use, prepare it bilingually or attach a translation, and have an authorised director certify the copy as true and affix the company seal, so it can then pass signature certification and consular legalisation.

How do I read the signing condition on the affidavit correctly?

The signing condition appears under the list of directors — for example two directors signing jointly and affixing the company seal, or only named directors being authorised. Read it in full: check whether the seal is required and which group of directors must sign with which. A signature that does not match the condition will be refused by banks, the Land Department or the foreign counterparty, and any legalisation already obtained is wasted.

Is a company seal still necessary in Thailand?

Thai law does not compel every company to have a seal. However, if the company has registered a seal with the DBD and the signing condition says the company seal must be affixed, a document without it does not meet the condition and does not bind the company. In practice, documents leaving the country should carry a clear impression that does not overlap the signature and matches the registered specimen, because legalisation officers compare it against the affidavit.

Will a document certified by a Thai attorney be accepted abroad straight away?

It depends on the recipient. Private counterparties frequently accept a Notarial Services Attorney's certification on its own, but foreign government offices, courts, company registries and banks usually require a further layer from the Legalization Division of the Department of Consular Affairs, and in some cases attestation at the destination country's embassy in Thailand as well. Ask the recipient exactly how far the chain must go before you start, so nothing has to be redone.

What is the legalisation chain for Thai corporate documents used abroad?

The standard sequence is: (1) obtain the original extract from the DBD, or prepare the corporate document and have the authorised directors sign it; (2) have the signature or the true copy certified by a Notarial Services Attorney where the recipient requires it; (3) prepare the English or destination-language translation; (4) file for legalisation at the Legalization Division of the Department of Consular Affairs on Chaeng Watthana Road or at a participating regional office; and (5) obtain attestation at the destination country's embassy, if that country still requires it.

When does the Apostille start to apply to Thai corporate documents?

Thailand has acceded to the HCCH Apostille Convention of 5 October 1961, and the Convention enters into force for Thailand on 28 February 2027. From that date, a Thai public document intended for use in another contracting state needs a single Apostille certificate instead of the current two-step chain, so destination-embassy attestation is no longer required. Until then, documents must still be legalised by the Department of Consular Affairs and, where applicable, attested at the destination embassy.

How are foreign corporate documents certified for use in Thailand?

They must first be certified in the country of origin — typically by a notary public and then by the apostille authority or that country's foreign ministry — and then attested by the Royal Thai Embassy or Consulate-General there. Once in Thailand, the documents are translated into Thai and the translation is legalised by the Legalization Division of the Department of Consular Affairs. Only then will the DBD registrar, banks and the Land Department accept them in support of an application.

Is express consular legalisation available, and how long does it take?

The Legalization Division of the Department of Consular Affairs offers both regular and express service. Regular service generally returns documents within about two to three working days, while express service can return a small batch on the same day. Actual timing depends on volume and on the channel used — the Chaeng Watthana counter, a regional office, or postal submission. Check the current notice at consular.mfa.go.th before promising a delivery date to a foreign counterparty.

What documents does a Thai company need to incorporate a subsidiary abroad?

The base pack is the parent's latest affidavit, the memorandum and articles of association, the shareholder list (Bor Or Jor 5), a board resolution approving the investment and appointing the person authorised to act, a power of attorney to the local agent in the destination country, certified copies of the directors' passports, and the latest financial statements. Every item must be translated into the destination language and legalised by the Department of Consular Affairs, plus the destination embassy where that country still uses the two-step chain.

What parent-company documents are needed to set up a Thai subsidiary?

Thai registrars and banks generally ask for the parent's certificate of incorporation or certificate of good standing, a certificate listing directors and shareholders, a board resolution approving the Thai incorporation, and a power of attorney to the person acting in Thailand. Each must be certified in the country of origin and attested by the Royal Thai Embassy, then translated into Thai with the translation legalised. If the activity falls within the lists annexed to the Foreign Business Act B.E. 2542, a foreign business licence, treaty rights or a BOI promotion certificate must also be considered.

How many certified sets of Thai corporate documents should we prepare?

Prepare at least two fully certified sets: one for the primary authority and one spare for the bank, the tax adviser, or in case a set is lost in transit — replacing a set means starting again with a fresh DBD extract and losing several working days. Scan every page immediately after certification and record the extract date and the legalisation date, so you can check the age of each document before the next filing.

Does a letter of consent to use a trademark need certification?

Where a group company seeks permission to use the parent's mark, or an existing owner consents to registration of a similar mark by a new applicant, the registrar asks for a letter of consent signed by the owner's authorised representative together with evidence of that authority. If the letter is executed abroad it must be certified by a notary public and attested by the Royal Thai Embassy, then translated into Thai with the translation legalised before filing with the Department of Intellectual Property.

What certification do documents for a foreign tender require?

Foreign procuring entities commonly ask for the company affidavit, a tax clearance or tax payment certificate, audited financial statements, references for completed projects, a bank letter of financial standing, a power of attorney for the person submitting the bid, and a declaration of no debarment. All of these must be translated and legalised to the level the tender documents specify, so read the document authentication clause in the tender pack closely before starting.

Bilingual or separate-language power of attorney: which works better?

For filings inside Thailand — the DBD, the Land Department, the Department of Intellectual Property — use the authority's Thai form. For use abroad, a single two-column bilingual document is generally preferable, with a clause stating which language prevails on conflict. That way the signing director and the receiving officer read the same instrument, and you avoid the common problem of a separate translation becoming detached from the original during legalisation.

The company seal was lost or damaged. What must be done before using documents abroad?

File an application with the Department of Business Development to register the change of company seal, attaching the board resolution and an impression of the new seal; if it was lost, record a police daily report as evidence. Once registered, obtain a new affidavit that shows the current seal, and only then start translation and legalisation. Using the old seal after registration of a new one is a frequent cause of documents being rejected because the impression does not match the affidavit.

A foreign bank asks for a Certificate of Incumbency, which Thailand does not issue. What do we use?

Combine the DBD company affidavit with the shareholder list (Bor Or Jor 5) and, where needed, a certificate signed by a director or company secretary confirming the directors, their positions and the shareholders as at the date of issue. Have a Notarial Services Attorney certify the signatory's signature, then translate and legalise through the Department of Consular Affairs. Most banks accept this bundle when the cover letter explains that it is the Thai registry equivalent.

What is needed for an ultimate beneficial owner (UBO) declaration for a Thai company?

Banks and foreign counterparties normally want a UBO declaration naming every natural person holding directly or indirectly above the applicable threshold — commonly 25 percent — or otherwise controlling the company. Supporting papers are the affidavit, the Bor Or Jor 5, an ownership chart traced up to natural persons, passport or ID copies of each UBO and proof of address. Copies should be certified by the authorised signatories, and legalised and embassy-attested where the receiving side requires it.

A foreign parent wants to set up a Thai subsidiary. What must be certified in the home country?

The core set is the parent's certificate of incorporation, a board resolution approving the investment and appointing the attorney, a power of attorney for the person acting in Thailand, and identity evidence for the signing directors. All of it is notarised in the home country and attested by the Royal Thai Embassy or the responsible authority, then translated into Thai with a certified translation for filing at the DBD. If the activity is listed under the Foreign Business Act B.E. 2542, a licence or certificate must also be considered.

What certified documents does a Thai company need to bid for a foreign tender?

Tender boards typically require a current company affidavit, the shareholder list, audited financial statements, past-performance certificates, a bank reference on financial standing, a tax clearance letter and a power of attorney for the person submitting the bid. Everything must be translated into the language named in the tender documents, legalised by the Department of Consular Affairs and attested at the destination embassy in Thailand. Allow three to four weeks, because bid deadlines are inflexible and one missing document disqualifies the whole submission.

Which language clause should a Thai-English contract use so a Thai court accepts it?

State plainly which version prevails if the two texts conflict, and keep that clause separate from the governing law and the courts-or-arbitration clause. If a dispute ends up in a Thai court, Thai is the language of the proceedings and a certified translation is required, so even where the English text prevails the Thai version should be prepared accurately at signing rather than rushed after a dispute arises — the single most common source of meaning disputes in cross-border contracts.

How should a letter of consent to use a trademark between group companies be certified?

It should identify the proprietor, the permitted user, the mark and registration number, the goods and services, the territory, the term and quality-control conditions, and be signed by the authorised signatories shown on each company's affidavit. Where one side is abroad, notarise and obtain embassy attestation. A licence intended to have full effect in Thailand should additionally be recorded with the Department of Intellectual Property as the law provides.

What is the correct order of certification for corporate documents used abroad?

Four steps: first obtain the freshest possible original extract from the Department of Business Development; second prepare a translation by a translator who certifies it, plus a Notarial Services Attorney certification where a director's signature must be witnessed; third legalise at the Legalization Division of the Department of Consular Affairs; fourth attest at the destination country's embassy or consulate in Thailand. Reversing the order — translating before pulling a fresh extract, for example — is the most frequent reason a whole set has to be redone.

How will the Apostille change corporate documents when it takes effect for Thailand on 28 February 2027?

For use in another convention state the chain will end with an apostille issued by the designated Thai authority, with no further attestation at the destination embassy, which shortens the timeline and cuts cost for affidavit and POA bundles. The earlier steps — obtaining the official extract and an accurate translation — stay the same. For non-member states, including several in the Middle East, the existing legalisation-plus-embassy route continues to apply.

Why are corporate documents rejected most often, and how do we prevent it?

The leading causes are an affidavit older than the recipient's limit, spelling of the company or director names that does not match the passport, a signatory who does not satisfy the registered signing condition, a missing company seal, incomplete or uncancelled stamp duty, a translation not physically attached to the legalised original, and steps performed out of order. Prevent it with a pre-submission checklist, by pulling the extract as close to the filing date as possible, and by getting the receiving authority's requirements in writing before step one.

How recent must a company affidavit be when sent abroad?

Most destinations require issue within three to six months. Foreign banks and European company registries are usually strictest at three months, while private counterparties often accept six. Count the age from the registrar's issue date, not from the date the translation was certified, and allow another one to two weeks for consular certification and embassy legalisation. Where the chain will be long, obtain a fresh affidavit before starting the certification process.

How can a director abroad grant a power of attorney for use in Thailand?

Sign before a notary in that country, then add an apostille if the country is a Hague Convention party, or legalise at that country's foreign ministry followed by the Thai embassy if it is not. On arrival in Thailand the document must be translated into Thai and the translation certified by the Department of Consular Affairs before filing. State the scope, the attorney's name and ID number, and an expiry date, because Thai authorities routinely reject open-ended wording.

Can a company translate its own affidavit and have a lawyer certify it?

If the destination is the Department of Consular Affairs for translation certification, its Legalization Division applies format and translator criteria, and self-made translations are often returned because the layout or registry terminology does not match. Where the destination is a private counterparty or bank, a translator's declaration plus signature certification is sometimes enough. The safe route is to ask the destination in writing what level of certification it needs before translation starts.

How should financial statements sent to a foreign parent company be certified?

Use the statements signed off by a licensed Thai auditor and already filed with the Department of Business Development, then have an authorised director certify the copies as true and affix the company seal. If the recipient is a foreign authority or bank, add a translation with the translation certified at the Department of Consular Affairs, and a further embassy legalisation where that country does not yet accept apostilles from Thailand. Attach a covering letter citing the accounting period and filing date so the set can be traced back.

Can a foreign shareholder appoint a proxy to attend a Thai shareholders' meeting?

Yes. Use a proxy form identifying the meeting number and date, the number of shares represented, and voting instructions for each agenda item. If signed abroad, notarise it and add an apostille or Thai embassy legalisation depending on that country's convention status, then submit a certified Thai translation. Deliver the original to the company by the deadline in the articles of association, because the chair may refuse to count votes when the paperwork is incomplete.

What parent-company documents are needed to open a representative office in Thailand?

Typically the parent's certificate of incorporation, evidence of the authorised signatories, recent financial statements, and a letter appointing the Thailand office manager. Each must be certified in the country of origin by apostille or Thai embassy legalisation, then translated into Thai with the translation certified before filing with the Department of Business Development. Check that documents are not older than the registrar allows, since stale documents usually mean re-doing the whole set.

Are electronic signatures reliable for cross-border business contracts in Thailand?

The Electronic Transactions Act recognises electronic signatures that identify the signer and link them to their intent, but transactions with a prescribed statutory form — land rights registration and documents requiring signature certification, for example — still need paper. In practice many foreign recipients ask for a wet-ink original so it can be legalised, so confirm with the recipient first and always retain the platform's identity-verification audit trail.

What is a tax residence certificate used for and where do I get one?

It confirms Thai tax residence so you can claim reduced or exempt withholding tax under a double tax agreement. Apply to the Revenue Department with your registration documents and filed tax returns. Once issued, it can be legalised at the Department of Consular Affairs and the relevant embassy if the recipient requires it. State the tax year and the treaty country in the application, since certificates are normally issued per tax year and per country.

A director or the registered address changes while documents are being legalised — must we start again?

If the change is registered before the recipient receives the documents, obtain a fresh company certificate and legalise a new set, because the recipient will compare it with the current register and find a mismatch. If the change happens after filing, a supplementary fresh certificate with a short chronology letter usually resolves it. Where possible, avoid registering changes while critical documents are in the legalisation pipeline.

Can an English company affidavit be obtained directly from the DBD?

The Department of Business Development issues English-language certificates on request, though the filing channel and queue differ from the Thai version. If the overseas recipient needs onward certification, obtain a recently issued English certificate and then certify it at the Department of Consular Affairs as required.

How can a foreign company's documents be used in Thailand?

They must first be certified in the country of origin — by apostille for Hague Convention states, or by the Royal Thai Embassy there — then translated into Thai with the translation certified as the receiving Thai authority requires, such as the DBD or the Land Department.

What certification level do financial statements need for a foreign tender?

Most tender bodies want statements signed by a licensed auditor with a certified translation; some also require consular certification and embassy legalisation. Read the tender instructions fully and confirm the required level in writing before starting.

How should a foreign shareholder signing abroad have documents certified?

Have the signature certified in the country of signing, then apostilled or legalised at the Royal Thai Embassy, then translated into Thai with the translation certified before filing in Thailand. Check that the name matches the passport spelling everywhere.

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Official sources referenced

Government fees and processing times on this page were last verified in July 2026 by our Notarial Services Attorneys registered with the Lawyers Council of Thailand. Figures follow published agency schedules, may change without notice, and actual turnaround depends on each authority's queue. Please reconfirm with the issuing authority before you file.