6 Key Defenses in Loan Dispute Cases Every Creditor and Debtor Should Know

Loan dispute cases are among the most common civil cases brought before Thai courts. Whether the loan involves friends, family members, business partners, or online transactions, disputes often arise when the borrower fails to repay the debt.
In many cases, defendants raise specific legal defenses to challenge the creditor’s claims. Understanding these defenses is important for both creditors seeking to enforce their rights and debtors attempting to protect themselves in court.
Below are six of the most common defenses raised in loan litigation cases under Thai law.
1. Arguing That the Loan Money Was Never Received
A defendant may admit signing the loan agreement but deny ever receiving the loan amount stated in the contract.
However, courts generally expect the defendant to provide a reasonable explanation, since people do not normally sign loan agreements without receiving any benefit in return.
Common arguments include:
- Being deceived into signing the document
- Signing under duress or coercion
- Misunderstanding the nature of the document
- The loan agreement being a disguised transaction intended to conceal another arrangement
To succeed with this defense, the defendant must provide convincing evidence or witness testimony showing that the loan transaction did not actually occur.
2. Arguing That the Full Loan Amount Was Not Received
Another common defense is admitting that some money was received, but claiming that the borrower did not receive the full amount specified in the agreement.
For example:
- Interest was deducted in advance
- Additional fees or “processing charges” were withheld
- Unlawful deductions were made before the money was handed over
If the defendant can prove the actual amount received, liability may be limited only to that amount.
For this reason, creditors should always keep clear evidence of payment transfers or delivery of funds.
3. Challenging Excessive Interest Rates
Under Thai law, interest rates are subject to legal limits. In general, contractual interest exceeding the lawful rate may be unenforceable.
If a creditor charges interest beyond the rate permitted by law:
- The excessive portion may be considered void
- The creditor may not be entitled to recover that amount
- Excess interest already paid may potentially be deducted from the principal debt
Interest-related disputes are frequently raised in court and can significantly affect the outcome of a case.
4. Claiming That the Debt Has Already Been Repaid
In some cases, the defendant does not deny borrowing the money but argues that repayment has already been made.
Evidence commonly used to support this defense includes:
- Bank transfer slips
- LINE or Messenger chat records
- Emails confirming receipt of payment
- Debt release documents
- Evidence showing repayment through other assets or arrangements
If sufficient evidence exists, the court may determine that the debt has already been fully or partially settled.
5. Arguing That There Is No Written Evidence of the Loan
Thai law generally requires loans of 2,000 Baht or more to be supported by written evidence in order to be enforceable in court.
Acceptable evidence may include:
- A written loan agreement
- Chat messages
- Emails
- Written acknowledgments of debt
- Transfer records clearly indicating that the payment was a loan
Without sufficient written evidence, a creditor may face difficulties enforcing the claim through litigation.
6. Failure to Affix Stamp Duty on the Loan Agreement
Certain loan agreements are required by law to bear stamp duty. If the required stamp duty is not properly affixed, the document may face limitations when used as evidence in court.
In practice:
- The court may refuse to admit the document during trial proceedings
- However, the missing stamp duty can often be paid retroactively, together with penalties, before the document is used as evidence
Therefore, creditors should carefully review all documents before filing a lawsuit, while defendants should also examine whether the agreement complies with legal formalities.
Conclusion
Loan disputes involve far more than simply determining who borrowed money and who failed to repay it. Various legal and evidentiary issues can significantly affect the outcome of the case.
The six common defenses discussed above include:
- Denial of receiving the loan funds
- Receiving less than the stated amount
- Excessive or unlawful interest rates
- Repayment of the debt
- Lack of written evidence
- Failure to comply with stamp duty requirements
For creditors, thorough documentation and proper legal preparation are essential before filing a claim.
For debtors and defendants, understanding these legal defenses may help protect their rights and improve their position in court proceedings.