Power of Attorney for a Land Boundary Survey (Thai Department of Lands, T.D. 21)

หนังสือมอบอำนาจ (ท.ด. 21) is the standard power of attorney form of Thailand’s Department of Lands (กรมที่ดิน). This version has the subject “ขอรังวัดสอบเขตที่ดิน” printed on it — a boundary verification survey: a Land Office surveyor measures the plot, re-sets the boundary markers and checks the boundary against the title deed. With it the landowner (principal) authorises another person (agent) to handle the survey on his or her behalf.

The printed powers already cover the whole procedure: applying for the survey, bringing the surveyor to the site, setting markers and certifying the boundary line, agreeing to correct the map, area and markers in the title deed if the survey shows a difference, amending the application, paying the survey deposit and collecting what is left, collecting the title deed and giving statements to the officer. The form records the land as shown on the title deed (โฉนด) and is filled in in Thai.

• the principal — the landowner named on the title deed (ผู้มอบอำนาจ);
• the agent — the person who deals with the Land Office and attends the survey (ผู้รับมอบอำนาจ);
• two witnesses who certify the principal’s signature or fingerprint.

Owners of neighbouring plots are not parties to this power of attorney; how they are notified and certify the common boundary is arranged by the Land Office.

• place and date (year in the Buddhist Era, พ.ศ.);
• land details from the โฉนด title deed: map sheet, land number, survey page, deed number, sub-district, district, province;
• name, Thai ID number, age, race, nationality, parents’ names, address and phone of the principal and of the agent;
• additional powers, if any (optional);
• signatures of the principal and two witnesses — by hand.

• the original title deed (โฉนดที่ดิน);
• copies of the principal’s ID card and house registration, signed by the principal;
• the agent’s ID card or passport.

The exact list, the survey fee and deposit, and the date of the field survey are not stated on the form — check with the Land Office (สำนักงานที่ดิน) where the land is registered.

1. Open the chat on this page and say who owns the land, who will act as agent and which plot is to be surveyed.
2. Send photos of the title deed and ID cards or answer the questions — the assistant writes the data in Thai script and converts the year to พ.ศ.
3. Check the fields and download the PDF.
4. Print it, sign it before two witnesses and hand it to the agent with the title deed and copies of documents.

Thai Department of Lands form “หนังสือมอบอำนาจ (ท.ด. 21) — รังวัดสอบเขตที่ดิน”: dol.go.th — รังวัดสอบเขตที่ดิน; Department of Lands: dol.go.th. Checked on 2026-10-08. This is not legal advice.