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Power of Attorney to Change the Owner’s Name-Surname on a Title Deed (Thai Department of Lands, T.D. 21)

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How it works

  1. 1

    Describe the case

    Write in the chat whose name changed, who will be the agent and which plot.

  2. 2

    Check the fields

    The assistant fills in the land, the parties and the old and new name in Thai script, with years in พ.ศ.

  3. 3

    Download the PDF

    Print it, sign it before two witnesses and hand it to the agent.

About the document

Country:
Thailand
Category:
Land and property
How to fill:
Chat in any language → original form → PDF
Price:
from 15 credits
Last updated:

What this document is

หนังสือมอบอำนาจ (ท.ด. 21) is the standard power of attorney form of Thailand’s Department of Lands (กรมที่ดิน). This sample has the subject “ขอแก้ชื่อ-สกุล” (request to correct name-surname) printed on it. It is used when a landowner has legally changed his or her first name or surname — for example after marriage — and the title deed still shows the old name: the owner (principal) authorises an agent to apply at the Land Office to have the name on the deed changed according to the attached copy of the name-change certificate.

The form records the land as shown on the title deed (โฉนด): map sheet, land number, survey page, deed number, sub-district, district and province. The printed powers text reads “from “Mr …” to “Mr …””; if the old or new title is Mrs (นาง) or Miss (นางสาว), the printed “นาย” is struck out and the correct title is written above it. The form is filled in in Thai.

Who takes part

  • the principal — the landowner whose name has changed (ผู้มอบอำนาจ);
  • the agent — the person who goes to the Land Office (ผู้รับมอบอำนาจ);
  • two witnesses who certify the principal’s signature or fingerprint.

What the form asks for

  • place and date (year in the Buddhist Era, พ.ศ.);
  • land details from the โฉนด title deed;
  • name, Thai ID number, age, race, nationality, parents’ names, address and phone of the principal and of the agent;
  • the former title and name as shown on the deed and the new title and name;
  • signatures of the principal and two witnesses — by hand.

Documents usually attached

  • the original title deed (โฉนดที่ดิน);
  • a copy of the name-change or surname-change certificate (ใบเปลี่ยนชื่อ / ใบเปลี่ยนนามสกุล), as the form itself refers to it;
  • copies of the principal’s ID card and house registration, signed by the principal;
  • the agent’s ID card or passport.

The exact list of documents, fees and processing time are not stated on the form — check with the Land Office (สำนักงานที่ดิน) where the land is registered.

How to fill it in with FoxDocs

  1. Open the chat on this page and describe the situation in any language: whose name changed, who will act as agent and which plot.
  2. Send photos of the title deed, the name-change certificate and ID cards or answer the questions — the assistant writes the data in Thai script and converts years 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.

Source

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

Frequently asked questions

What is this power of attorney for?

It lets another person apply at a Thai Land Office to change the owner’s name and surname on a title deed after the owner has legally changed his or her name.

Who signs it?

The landowner whose name changed, as principal, before two witnesses.

What if the title is not “Mr”?

The form prints “นาย” (Mr) as a sample. If the old or new title is นาง (Mrs) or นางสาว (Miss), the printed word is struck out and the correct title is written above it — FoxDocs does this automatically.

Which document proves the name change?

The powers text refers to an attached copy of the name-change certificate (ใบเปลี่ยนชื่อ / ใบเปลี่ยนนามสกุล). Other supporting papers may be requested — check with the Land Office.

Can it be used for land with an น.ส.3 certificate or for a condominium unit?

The form is meant for land with a โฉนด title deed. For other land documents and for condominium units the Department of Lands uses other forms — check with the office.

In which language is the form filled in?

In Thai: names, addresses and land details are written in Thai script; years are in the Buddhist Era.

How much does it cost and how long does it take?

The form does not state fees or processing time. Check with the Land Office where the land is registered.

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