Debt Acknowledgment in Thailand: What It Is, How It Differs From a Loan Agreement, and How the Limitation Period Resets

A debt without a contract is not always a lost cause. If the debtor is willing to sign a debt acknowledgment letter (หนังสือรับสภาพหนี้), the creditor gains both written evidence and, potentially, a fresh window of time to take legal action.

The typical situations: you lent money to a relative on a verbal agreement, a customer never paid for goods, or an existing debt was restructured into a new instalment plan. This article explains what a debt acknowledgment is, how it differs from a loan agreement, what it does to the limitation period, and whether it can be signed online.

TL;DR: A debt acknowledgment is a document in which the debtor signs to confirm that a debt genuinely exists. It is used for debts that have already arisen (verbal loans, unpaid goods, damages) — unlike a loan agreement, which is the contract that creates the debt in the first place. Its most important effect is that it interrupts the limitation period and restarts the clock in full (Section 193/14 of the Civil and Commercial Code). But if the debt is already time-barred, an acknowledgment of liability gives only a 2-year fresh limitation period (Section 193/35). The law does not require witnesses; what matters is the debtor's signature, which can be applied electronically under the Electronic Transactions Act B.E. 2544 (2001). (General information, not legal advice.)

Key Takeaways

• A debt acknowledgment is a unilateral document in which the debtor confirms an existing debt; it does not create a new one
• The limitation period is interrupted and restarts in full if the acknowledgment is made before the debt becomes time-barred (Sections 193/14, 193/15)
• If the debt is already time-barred, the acknowledgment gives only a fresh 2-year period (Section 193/35)
• Witnesses are not legally required; the debtor's signature is what matters
• A LINE chat in which the debtor admits the debt may interrupt the limitation period, but as evidence it "may not be clear enough" compared with a signed document
• It can be signed online under the Electronic Transactions Act B.E. 2544 (2001)

What Is a Debt Acknowledgment?

A debt acknowledgment is a unilateral document in which the debtor signs to confirm a debt that has already arisen — whether from a loan, unpaid goods, or damages. It is not a contract that creates a new debt.

The difference from a loan agreement: a loan agreement is the originating contract that brings the debt into existence, while a debt acknowledgment is a later confirmation that an existing debt is real.

If there is no originating contract yet, read the full guide to loan agreements in Thailand alongside this one.

What Happens to the Limitation Period?

Acknowledging a debt interrupts the limitation period: the time that has already run is wiped out and the full period starts counting again (Sections 193/14, 193/15). But if the debt was already time-barred before the acknowledgment, the law grants only a fresh 2-year period (Section 193/35).

This is the single most important distinction in this article, because the outcome differs enormously depending on whether the debt was still within time — or already time-barred — on the day the debtor signed.

What a Debt Acknowledgment Must Say

A debt acknowledgment that actually works must identify the parties, state the origin of the debt, the amount acknowledged, the repayment terms, the date of the document, and carry the debtor's signature.

• Party identification — names and addresses of creditor and debtor
• Origin of the debt — e.g. a verbal loan, unpaid goods, or damages
• Amount acknowledged — including interest if any, which must not exceed 15% per year under the same principle that governs loan agreements
• Repayment terms — the agreed date or instalment plan
• Date of the document and the debtor's signature — the indispensable core

Do You Need Witnesses? Does It Need to Be Registered?

No witnesses are required, and there is no registration with any government office. The law does not require a debt acknowledgment to be witnessed — though adding witnesses is an option that can strengthen the evidentiary weight.

Does a LINE Chat Where the Debtor Admits the Debt Count?

A chat message in which the debtor clearly admits the debt — "I'll pay next month" — may be enough to interrupt the limitation period. But as evidence it "may not be clear enough" compared with a signed document, because proving who typed the messages and their context is harder. A clearly signed document is always the more solid option.

The Debt Is Already Time-Barred — Can You Still Do This?

Yes. A time-barred debt does not disappear; the debtor merely gains the right to refuse payment. If the debtor acknowledges liability after the debt has become time-barred, the law grants a fresh 2-year limitation period — and if the debtor voluntarily pays, the payment cannot be reclaimed.

Can a Debt Acknowledgment Be Signed Online?

Yes. The core of a debt acknowledgment is the debtor's signature, and electronic signatures are recognized under the Electronic Transactions Act B.E. 2544 (2001) — provided the method used is reliable and can be verified after the fact.

The practical advantage: debtors are often far away or avoid meeting in person. Sending an online signing link removes the scheduling and printing obstacles. OTP identity verification and a recorded audit trail strengthen the evidentiary weight regarding who signed — they are not an absolute, 100% legal guarantee.

Read the full guide to the legal validity of electronic signatures in Thailand

How to Create a Debt Acknowledgment in 10 Minutes

Create the debt acknowledgment in the Jabmue document editor: fill in the parties, the origin of the debt, the amount, and the repayment terms, then send the debtor a signing link. You get a PDF with a complete record of when it was signed.

Jabmue provides document templates and signing tools; it is not a legal advisor. For complex debts or existing disputes, consult a lawyer before proceeding.

Frequently Asked Questions

What is a debt acknowledgment letter?

A unilateral document in which the debtor signs to confirm an existing debt — whether from a loan, unpaid goods, or damages. It differs from a loan agreement, which is the contract that creates the debt in the first place.

Are witnesses required?

No. The law does not require witnesses on a debt acknowledgment, though adding them can strengthen the evidentiary weight.

How many years does the limitation period reset to?

If signed before the debt becomes time-barred, the limitation period is interrupted and restarts in full. If the debt is already time-barred, the acknowledgment grants only a fresh 2-year period.

How is it different from a loan agreement?

A loan agreement is the contract that creates the debt from the start. A debt acknowledgment is a unilateral document confirming a debt that already exists — typically used when there was no originating contract, or to re-confirm the debt.

Can it be signed online?

Yes, under the Electronic Transactions Act B.E. 2544 (2001), provided the signing method is reliable and verifiable after the fact.

Summary

A debt acknowledgment is the creditor's tool for creating written evidence after the fact — and potentially restarting the limitation period. The critical distinction: the outcome depends entirely on whether the debt is still within time or already time-barred.

If you don't yet have an originating contract for a new loan, read the loan agreement guide alongside this one.

Try it free — create a debt acknowledgment and send it for signature

This content is general information, not legal advice for any specific case. Consult a legal advisor before using any document.