Foreign wills and foreign probate — using them for Thai assets

Name: NYC Language Institute — สำนักงานใหญ่ลาดพร้าว 95
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A will or grant of probate made abroad does not take automatic effect in Thailand. This page explains the certification chain, certified translation, and how those documents support a petition in a Thai court.

Assets located in Thailand — land, condominium units, deposits in Thai banks, shares in Thai companies — go through the Thai process even where the deceased made a will abroad and a foreign court has already granted probate. Those foreign documents are evidence in support of a Thai petition; they do not replace a Thai court order.

The certification chain is where most files go wrong. The document must be certified through the origin country's chain up to that country's foreign ministry, then certified by the Royal Thai Embassy or Consulate there. Once in Thailand it is translated into Thai and, where the recipient requires it, the translation is legalised by the Department of Consular Affairs.

A foreign will raises two separate questions. First, is it formally valid under the law of the place where it was made? Second, does any of its terms conflict with Thai law? A common example is a gift of land to a foreign beneficiary: even with a valid will, the beneficiary remains subject to the restrictions on foreign land holding in the Land Code.

Translation must keep personal names spelled exactly as in the passport and every civil registration record. Spelling mismatches between a foreign death certificate, the will and the foreign court order force explanatory affidavits and delay the file, so reconcile spellings before the certification chain starts.

If the administrator appointed abroad cannot travel to Thailand, a representative in Thailand can act for some steps under a power of attorney. That power must be signed before a Thai consular officer or a notary in that country and follow the same certification chain as the other documents.

Documents to prepare

The original foreign will or a copy certified by the office holding it
The foreign grant of probate or letters of administration
Death certificate issued in the country where the death occurred
Passports of the deceased and of the heirs
Proof of relationship such as marriage or birth certificates
Evidence of the assets situated in Thailand
A power of attorney if the administrator will not attend in person

Certification order

Obtain originals or office-certified copies from the issuing authority abroad
Complete the origin country's certification chain up to its foreign ministry
Have the documents certified by the Royal Thai Embassy or Consulate in that country
Translate into Thai through a translator the recipient accepts
Legalise the translation at the Department of Consular Affairs where required
File them in support of the petition in the competent Thai court

Pre-filing checklist

Name spellings match the passport across every document
Foreign documents completed the full chain before translation
The Thai translation covers every page, including seals and reverse-side text
No clause conflicts with restrictions on foreign ownership of Thai property
You have identified which Thai assets need a Thai court order and which do not

Frequently asked questions

Can a foreign court order be used directly at a Thai Land Office?

Generally no. The Land Office requires a Thai court order as proof of authority. The foreign order is evidence supporting a Thai petition to appoint an administrator here.

Does a foreign will have to be remade in Thai form?

Not if it is valid where it was made, but it must be certified and translated into Thai before use in a Thai court. People with substantial Thai assets often make a separate Thai will to shorten the process.

When will Apostille remove the embassy step?

Per HCCH, the Convention enters into force for Thailand on 28 February 2027. Until then the existing chain applies, and afterwards practice will follow the implementing guidance Thai authorities publish.

Translate the whole will or only the Thai-asset clauses?

Translate the whole will. The court reads the instrument as a whole and checks for conflicting clauses; partial translations are usually sent back for completion.

Must heirs living abroad travel to Thailand?

Often not, provided their consents and powers of attorney are signed at a Royal Thai Embassy or Consulate and complete the certification chain, though the court may still ask an heir to appear.

For a document review before filing with a court or Land Office, contact LINE @nycli, phone +66-83-249-4999 or email nycli@ilc.ltd. Our team will confirm the steps, anything still missing and a realistic timeline.