Power of attorney for Thai property, signed abroad

You can buy or sell property in Phuket without flying in: an attorney signs the Land Office registration on your behalf. The power of attorney for that has to go on the Land Office's own form, filled in completely before anyone signs it, and witnessed by at least two people. If you sign abroad, a notary certifies your signature, your country's foreign ministry authenticates the notary, and the Royal Thai Embassy or Consulate legalises the result; from 28 February 2027, an apostille from your country will replace the foreign-ministry authentication and the embassy's legalisation step, if your country is a party to the Apostille Convention and has not objected to Thailand's accession. Below is each step, and the reasons a Land Office sends a power of attorney back.

In short

• The Land Office works from its own form. A power of attorney you draft yourself, or one on your home country's template, does not take its place in practice.
• The form has to name the act directly — buy, sell, mortgage — and the specific property. A general grant of authority is not enough.
• Fill in the form completely before you sign it. Any correction needs a note of how many words changed, signed by the grantor beside it, and you need at least two witnesses.
• Signing abroad means a three-step chain: a local notary, your country's foreign ministry, then the Royal Thai Embassy or Consulate. From 28 February 2027, an apostille replaces the foreign-ministry and embassy steps, if your country is a party to the Convention and has not objected to Thailand's accession.
• Ask the receiving Land Office, before the attorney goes in, what Thai translation it wants and how old a power of attorney it will still accept.

When a Thai property deal needs a power of attorney

You need a power of attorney whenever you cannot attend the registration at the Land Office yourself — the government office that records sales, purchases, mortgages and long leases of Thai real estate. For a sale, purchase or mortgage, the Land Office needs a written power of attorney on its own form, and a general grant of authority is not enough: the form has to name the specific act — buy, sell, mortgage — and the property itself. If the grantor's or the attorney's circumstances change between signing and registration — for example, either one dies, loses legal capacity or goes bankrupt — check with the Land Office and your lawyer whether the power of attorney still holds before you go ahead with the registration.

The same office also registers long-term leases, up to 30 years (s. 540 of the Code), so a power of attorney matters just as much if you are buying a villa on a leasehold and cannot be there for that registration either. A leasehold purchase on Phuket typically runs the full 30-year term; the lease is registered through an attorney in the same way, though the power-of-attorney form and the supporting documents for that registration are confirmed with the specific transaction.

The Land Office power of attorney form

The Department of Lands publishes its own power of attorney forms on its download page. Land with a title deed (a chanote) uses Tor Dor 21; a condominium unit uses a separate form that embassies and law firms refer to as Or Chor 21. There is also a general-purpose form. Land Offices in practice expect one of these, and law firms report that a document in your own wording, or on a form from your home country, does not take its place — this is office practice rather than a rule published anywhere, so we check it with the specific office before you sign.

The form itself asks for three things: the property and its title details, the act you are authorising (buy, sell, mortgage), and any special conditions. A power of attorney also carries Thai stamp duty — THB 10 if the attorney is authorised for one act, THB 30 for several (Revenue Department).

Signing and certifying abroad

The Tor Dor 21 form itself tells signers that a power of attorney made abroad "should" be certified by an embassy, a consulate, or a notary public (dol.go.th). In practice, the choice is narrower than that wording suggests, because Thai embassies generally do not certify a foreign national's own signature.

The Royal Thai Embassy in London says this outright: it cannot verify the signature of a foreigner. For a property document, a UK solicitor or notary certifies the signature first, the Foreign, Commonwealth & Development Office legalises that certification, and only then does the Embassy add its own legalisation. The Embassy in Washington D.C. offers signature certification on the Land Office forms only to Thai nationals in its consular district; for everyone else, the practical route runs through the foreign ministry first, the same as in the UK. For Australian signers, confirm the order of local certification and authentication with the Embassy in Canberra before you sign.

Where you sign	Before the Thai embassy	The Thai embassy step
United Kingdom	Solicitor or notary, then FCDO legalisation	London legalises the FCDO-certified document; GBP 10 per document, 3 working days, excluding delivery
United States	Confirm the certification and authentication steps with the embassy for your consular district	Washington certifies signatures only for Thai nationals; everyone else confirms a separate legalisation route with the embassy
Australia	Confirm the local certification and authentication order with the embassy	Canberra legalises once that is done

Fees and processing times belong to each mission, so confirm them on the page for your own country before you book a notary appointment. The Land Office's own instructions require the form to be complete before anyone signs it; London's procedure also will not let you alter the document once it carries a stamp, and it is worth checking the correction rules for your own route before you sign.

Legalisation now, the apostille from 28 February 2027

Thailand deposited its instrument of accession to the Apostille Convention on 30 June 2026, and it enters into force for Thailand on 28 February 2027 (HCCH status table). Until that date, the full legalisation chain applies: notary, foreign-ministry authentication, Thai embassy or consulate.

From 28 February 2027, an apostille from the competent authority in your own country — found on the HCCH's official list of competent authorities — replaces the foreign-ministry authentication and the Thai embassy's legalisation step, if your country is a party to the Convention and has not objected to Thailand's accession. Before choosing the apostille route, check the HCCH status table to confirm that the Convention will apply between Thailand and the issuing country on the intended date of use. The apostille does not replace the signature certification that comes before it — who can perform that certification, and exactly what act gets apostilled, depends on your country's own rules and on what the receiving Land Office asks for. The Department of Lands has not published how its offices will treat an apostilled power of attorney once the Convention takes effect, so we confirm this with the specific Land Office close to your signing date.

Why a power of attorney gets rejected

The Department of Lands prints seven warnings on the Tor Dor 21 form itself. We check the same points for a condominium power of attorney and confirm with the Land Office whether its own form's warnings differ:

1. The title and property details are unclear or incomplete.
2. The act and the powers granted are not stated directly — write exactly what is authorised (buy, sell, mortgage) and any special conditions.
3. The text mixes handwriting or ink colours, or was typed on more than one machine.
4. A correction, erasure or insertion does not say how many words changed, or the grantor did not sign beside it.
5. The grantor signed before the form was completely filled in.
6. There are fewer than two witnesses — or, where the grantor signs with a thumbprint, fewer than two witnesses who sign rather than thumbprint themselves.
7. A power of attorney made abroad was not certified.

Two more points sit outside that list. The Royal Thai Embassy in Washington notes that Land Offices often ask for a certified copy of the grantor's passport attached to the document. Separately, it is worth checking that the identification details and the spelling of your name are consistent across the passport, the power of attorney and its Thai translation. And although Thai law sets no expiry date for a power of attorney, an office can still question one that was signed a long time before the registration appointment — ask the specific office about its own practice before you fix a signing date.

Thai translation

The Land Office's own form is in Thai. If the power of attorney, or any document attached to it, is in another language, the office usually wants a Thai translation. Whether that translation needs to be certified by a translator or by Thailand's Department of Consular Affairs is not something the Department of Lands has published, so we confirm it with the office handling your registration. We also prepare the paperwork in two languages — Thai alongside English — so you can read exactly what you are signing.

What to prepare before you sign

1. Ask the Land Office handling your deal which form and which supporting documents it wants.
2. Fill in the form completely before anyone signs it — leave nothing for later.
3. Arrange two witnesses who will sign alongside you.
4. Go through the notary, your foreign ministry and the Thai embassy — or, from 28 February 2027, get an apostille if your country is a party to the Convention and has not objected to Thailand's accession.
5. Confirm what needs a Thai translation, and get a certified copy of your passport ready.
6. Send the original to your attorney with enough time to reach them before the registration date.

A power of attorney does not replace the paperwork for the deal itself. Under the Condominium Act, a foreign buyer typically has to show the funds came from abroad, usually with proof of an international bank transfer; the Land Office will also want a debt-free letter from the juristic person and confirmation that the foreign quota has room for your unit. Our condo buyer's checklist covers that paperwork in full, and the process itself is on buying a condo in Phuket. For a typical example of a quota problem before registration, see the foreign quota ran out a week before closing.

How we can help

Our team drafts the power of attorney on the Land Office's own form, prepares the Thai translation, and maps out the signing and legalisation route for your country. That service is described on notary services in Phuket; pricing is [price]. If a document also needs legalising for a different Thai authority, see document legalisation for Thailand.

If you are buying, send us the purchase or reservation contract: a preliminary review is free and takes up to 48 hours. Tell us where you plan to sign and what the property is, and we will reply within 24 hours with what needs doing, how long it takes and what it costs.