Thailand's new Will registration rules (24 March 2026): what property owners need to update

Does this change who inherits your Thai property? No — it changes how a will gets made and registered. The Ministerial Regulation on the Preparation of Wills and Declarations of Intention Concerning Inheritance, B.E. 2569, was published in the Government Gazette on 22 January 2026 and took effect 60 days later, on 24 March 2026. It replaces an administrative framework that had gone essentially unchanged since the 1960s for the 'public will' (a will made and registered before a district officer) — the form most commonly recommended to foreign property owners because it is drafted and held by a government office, not a private drawer.

What actually changed

• Uniform national forms — the Department of Provincial Administration (DOPA) now prescribes standardised forms used at every district office, replacing inconsistent local practice.
• Registration at any district office — a testator can register a public will at any Amphur, King Amphur or Bangkok Khet office, not only the one covering their registered address.
• An official will register — each district office maintains a formal register of wills made before it, with a certified copy and receipt issued to the testator.
• Stricter capacity and intent checks — district officers are directed to more rigorously assess that the testator understands and freely intends the declaration, and to refuse a will where coercion or incapacity is suspected.
• Clearer witness rules — a public will still requires at least two qualifying witnesses; beneficiaries and their spouses cannot act as witnesses, and minors or those without full mental capacity are disqualified.

What the process looks like now

The core steps stay recognisable: bring identification, a schedule of assets and two qualifying witnesses to a district office; declare your testamentary wishes orally to the officer; the officer records the declaration on the standardised form and reads it back for confirmation; testator, witnesses and officer sign, the office seal is applied, and the will is entered in the district register. The regulation is procedural — it does not touch the substantive inheritance rules in the Civil and Commercial Code that determine who your statutory heirs are if you die without a will, or how forced-heirship shares work.

Do you need to redo an existing will?

No. A public will registered before 24 March 2026 under the old procedure remains legally valid — the regulation is not retroactive and does not invalidate anything already on file. Voluntary re-registration under the new standardised forms is optional, and mainly useful if your existing will is old, poorly documented, or you want the clarity of the new official register. What is worth checking, regardless of registration date, is whether the will's content still matches what you actually own today.

Why this matters specifically for property owners

As set out in Inheritance on Koh Phangan, a leasehold, the villa building and any company shares pass to heirs in different ways under Thai law, and a lease does not transfer automatically unless the contract itself provides for it. A will only works if it correctly names and describes each of these Thai assets — the more standardised registration process is a good prompt to review that your will actually lists your current leasehold, the villa structure, and any Thai company shares by their correct legal description, not just 'my property in Thailand.'

• No citizenship or residency requirement — a valid passport is sufficient to register a public will; you do not need a Thai visa, work permit or house registration to do it.
• Bring an interpreter if you don't speak Thai — the declaration and forms are in Thai, and a qualified interpreter is needed to confirm you understand what is being recorded.
• Coordinate a Thai will with any will at home — a separate Thai will covering only Thai assets, drafted so it doesn't unintentionally revoke a will made in your home country, is the standard advice from Thai law firms for foreign owners.
• Certified translations — if the will (or the district register's certified copy) needs to be used abroad, budget for a certified translation alongside the Thai original.

This is a paperwork-quality reform, not a change to inheritance law itself — but for a foreign owner, paperwork quality is exactly what determines whether your heirs get a smooth probate or a contested one. If your will predates a lease renewal, a company restructure, or simply hasn't been looked at in a few years, this is a reasonable moment to have a Thai lawyer confirm it against what you currently own. See also Freehold condo vs leasehold villa for a foreigner for how the asset type affects what an heir actually receives.