Power of Attorney for Increase of Mortgage Amount (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 “ขึ้นเงินจากจำนอง” — increase of the mortgage amount — printed on it. With it the owner of a plot already mortgaged under a registered จำนอง contract authorises another person to register an increase of the mortgage amount at the Land Office: file the application, give statements to the officer and sign until the registration is completed.

The form records the land as shown on the title deed (โฉนด), which increase this is, the date of the existing mortgage contract, the amount of the increase and the new total mortgage amount — in figures and in words. All other terms stay as in the original contract. The form is filled in in Thai.

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

If the agent is the mortgagee itself (for example an employee of the lending bank) or represents it, 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 increase number (“ครั้งที่”) and the date of the existing mortgage contract;
• the amount of the increase and the total mortgage amount after it — in figures and in words;
• signatures of the principal and two witnesses — by hand.

• the original title deed (โฉนดที่ดิน);
• the existing mortgage contract;
• 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 and with the mortgagee.

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, the date of the mortgage contract and by how much the amount increases.
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. and writes the amounts in words.
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) — ขึ้นเงินจากจำนอง”: dol.go.th — ขึ้นเงินจากจำนอง.pdf (Wayback archive copy); Department of Lands: dol.go.th. Checked on 2026-10-08. This is not legal advice.