Power of Attorney for Registration of a Seller’s Preferential Right (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 “บุริมสิทธิ” — preferential right — printed on it. It is signed by a buyer who bought a plot from a seller but has not paid the full price: the buyer authorises an agent to register at the Land Office that the plot is subject to the seller’s preferential right — file the application, give statements to the officer and sign until the registration is completed.

The seller’s preferential right (บุริมสิทธิ) secures payment of the unpaid part of the price. The powers text states the seller’s name, the date of the sale contract, the unpaid balance (in figures and in words), the amount of each installment, the number of installments and the interval between them in months. The form is filled in in Thai.

• the principal — the buyer and current owner of the plot on the title deed (ผู้มอบอำนาจ);
• the agent — the person who goes to the Land Office (ผู้รับมอบอำนาจ);
• the seller — holder of the preferential right; only the name appears on the form;
• two witnesses who certify the principal’s signature or fingerprint.

If the agent is the seller or represents the seller, the note on the form requires adding consent that the agent acts both in his or her own name and on behalf of the other party.

• 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 seller’s title and name and the date of the sale contract;
• the unpaid balance and the amount of each installment — in figures and in words, the number of installments and the interval between them in months;
• signatures of the principal and two witnesses — by hand.

• the original title deed (โฉนดที่ดิน);
• the sale contract for the plot;
• copies of the principal’s ID card and house registration, signed by the principal;
• the agent’s ID card or passport;
• where relevant — marital status documents or the spouse’s consent.

The exact list, fees and processing time 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 describe the situation in any language: who owns the land, who will act as agent, which plot, who the seller is, the date of the sale contract and the installment terms.
2. Send photos of the title deed and ID cards or answer the questions — the assistant writes the data in Thai script, converts the year to พ.ศ.; the amounts in words are written by hand when signing.
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) — บุริมสิทธิ”: dol.go.th — บุริมสิทธิ.pdf; download page: dol.go.th — power of attorney samples. Checked on 2026-10-08. This is not legal advice.