How to Make a Valid Will in Thailand

What Is a Will and Why Is It Important?

A will (last testament) is a document expressing the testator's wishes — while alive — for how their assets should pass to specific persons after death. It is a critical estate-planning tool, especially in modern families with complex structures: blended families, unregistered partners, children born outside marriage, or businesses meant to pass to specific successors.

Without a will, assets pass according to the statutory order of "intestate heirs" under the Civil and Commercial Code, which may not match the deceased's actual wishes.

Applicable Law

Wills and estate administration are governed by Book 6, Title 4 of the Civil and Commercial Code (Sections 1646–1710), covering:

• Capacity to make a will (Section 1646)
• Five recognized forms of wills (Sections 1656–1664)
• Revocation and amendment (Sections 1693–1696)
• Estate administrators and estate management (Sections 1711–1737)

Who Can Make a Will?

Under Section 1646:

• At least 15 years old
• Of sound mind at the time of execution — not insane or under court-declared incapacity
• Acting voluntarily — not under duress, fraud, or material mistake

Five Will Forms Recognized in Thai Law

1. Ordinary Written Will (Section 1656)

Written, dated, and signed by the testator, with two witnesses who sign at the same time as the testator. May be typed or handwritten. The most widely used form.

2. Holographic Will (Section 1657)

The testator writes the entire content by hand, dates it, and signs it. No typing allowed. No witnesses required. Suitable when privacy is important.

3. Public Form Will (Section 1658)

Made at a District Office before the District Officer, with two witnesses. The original is kept at the office and a copy is given to the testator. The most secure form — official records make forgery very difficult.

4. Secret Document Will (Section 1660)

The testator writes the will, places it in a sealed envelope, signs the envelope, and presents it to the District Officer with two witnesses. Useful when the contents must remain confidential until death.

5. Oral Will (Section 1663)

For genuine emergencies — imminent death or inability to write. Made before two witnesses, who must report to the District Officer within 24 hours. Valid for only 1 month; if the testator survives, a new will in another form is needed.

Who Cannot Be a Witness?

Under Section 1670, the following cannot serve as witnesses:

• Persons under the age of majority (under 20)
• Persons of unsound mind or under court-declared incapacity
• Persons who are deaf, blind, or mute
• Beneficiaries under the will or their spouses

Using a disqualified witness can void the will. A bequest to a witness is void even if the rest of the will is valid.

What to Include in a Will

• Specific assets — Land with title number, bank accounts with account numbers, vehicles with registration, shares.
• Beneficiaries — Full name, relationship, address.
• Specific shares or specific bequests — Who gets what and how much.
• Estate administrator — The person appointed to manage the estate.
• Special conditions — E.g., "to my child upon reaching majority"; "to my spouse for life, then to my children."
• Funeral wishes — Morally binding but limited legal force.

Spouse and Heir Rights

An important point: Thai law allows the testator to distribute assets freely under a will. There is no "forced heirship" system as in French civil law. Children, spouse, and parents have no statutory minimum share.

Important exception: A registered spouse automatically owns half of marital property (sin somros) by community ownership before any inheritance distribution. Personal property (sin suan tua) may be willed to anyone.

Revocation and Amendment

The testator can revoke a will at any time while alive and of sound mind. Sections 1693–1696 provide:

• Make a new will explicitly revoking the prior one
• Make a new will with content inconsistent with the prior one (revokes only the inconsistent parts)
• Intentionally destroy the will (tear, burn, cross out)
• Transfer or destroy the specific asset before death

Estate Administration After Death

1. Register the death and obtain a death certificate — At the District Office within 24 hours.
2. Locate and open the will — Public-form wills are at the District Office; private wills may be with a lawyer or in a safe.
3. Petition the court to appoint an estate administrator — Even with a will, court-appointed authority is usually required to manage assets.
4. Administrator gathers the estate — Closes accounts, sells assets, pays the deceased's debts.
5. Distribute the estate — Per the will, or per intestate rules if no will exists.

Hypothetical Case Studies (Educational)

Case 1 — Simple family: Mr. A has a wife and two children. He makes an ordinary written will at home with two friends as witnesses, leaving the house to his wife and dividing the land between his children. On his death, the will is valid; heirs petition for an administrator as named in the will.

Case 2 — Complex family: Ms. B has an unregistered partner and one acknowledged child born outside marriage. She makes a public-form will at the District Office, leaving assets to the partner and the child. Other relatives cannot challenge the will because Thai law has no forced heirship.

Case 3 — Invalid will: Mr. C types his entire will and signs it with only one witness instead of the required two. The will is void; assets pass to intestate heirs under Section 1629.

Common Mistakes

• Drafting a will without knowing the legal form — A typed will without witnesses is void.
• Using a beneficiary or their spouse as a witness — Voids the bequest to that witness.
• Not dating the will — Creates disputes when multiple wills exist and the order is unclear.
• Storing the will where no one can find it — Heirs cannot locate it after death.
• Not updating after life changes — Divorce, remarriage, new children, new assets — old wills may not match current intent.
• Not consulting a lawyer — Especially when assets are valuable or family is complex.

Frequently Asked Questions

How much does a will cost?
A holographic will is free if you write it yourself. A public-form will costs THB 50–200 in District Office fees. Lawyer drafting fees start at THB 5,000–30,000 depending on complexity.

Are foreign wills valid in Thailand?
Yes if made under the law of the country where executed and consistent with applicable treaties. In practice, a separate will for Thai assets is recommended.

Can I disinherit my children?
Yes. Thai law has no forced heirship. The testator may exclude children from the will, though they may challenge on grounds such as duress or fraud.

What if a beneficiary dies before the testator?
That bequest fails and falls to the testator's intestate heirs unless the will provides for a substitute beneficiary.

Where should I store the will?
The most secure option is at the District Office (public-form) or with a lawyer, telling a trusted person where it is.

Conclusion

Making a will is an act of love and responsibility for those left behind, preventing disputes and ensuring lifelong assets pass to those genuinely intended. Use a legally recognized form, consult a lawyer for complex cases, and review every 3–5 years or whenever family circumstances change.