Mortgage Foreclosure in Thailand: What Lenders Must Do and What You Owe After the Auction
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What a Mortgage Is Under Thai Law
A mortgage over Thai land or a condominium unit must be made in writing and registered with the competent official. An unregistered mortgage is void, which is why every genuine mortgage appears on the reverse of the title deed. That also means a title search tells you precisely what mortgage burdens a property carries before you buy it.
A mortgage is security over the property itself. It is not, by itself, a personal promise to pay the shortfall, and that distinction runs through everything below.
The Sixty-Day Notice a Mortgage Lender Must Serve
Section 728 of the Civil and Commercial Code is the gateway to enforcement. Before enforcing a mortgage, the mortgage lender must serve written notice on the debtor requiring payment within a reasonable period, which must be not less than sixty days from the date the debtor receives it. Only if the debtor fails to comply may the mortgage lender bring an action asking the court to order seizure of the mortgaged property and its sale by public auction.
This is not a formality. A mortgage enforcement action filed without a compliant notice, or on a notice giving less than sixty days, is open to attack. The first thing to do when a mortgage demand arrives is therefore to check the date of receipt and count the days, and to keep the envelope.
The Second Notice When You Mortgaged Property for Somebody Else
Many foreigners in Thailand are not the borrower on the mortgage at all. They have mortgaged a property to secure a company's loan, or a spouse's, or a business partner's. Section 728 paragraph two gives that person a distinct protection that is widely overlooked.
Where a person has mortgaged their own property to secure a debt that somebody else must pay, the mortgage lender must send the same notice to that mortgage provider within fifteen days of sending it to the debtor. If the lender fails to do so within those fifteen days, the mortgage provider is released from liability for interest, compensation and ancillary charges owed by the debtor which accrue after that fifteen-day period expires.
On a long-running default this can remove years of accumulated interest from the claim. It is worth asking the mortgage lender to produce proof of the date it served each notice.
Forcing a Mortgage Sale Without a Court Case
Section 729/1 gives the person who granted the mortgage a tool that very few borrowers know they have. At any time after the debt has fallen due, provided no other mortgage or registered preferential right exists over the same property, the mortgage provider may give the lender written notice requiring it to sell the mortgaged property by public auction without filing a court case. That notice is treated as consent to the auction, and the mortgage lender must carry out the sale within one year of receiving it.
If the mortgage lender does not sell within that year, the mortgage provider is released from liability for interest, compensation and ancillary charges accruing after the deadline passes. When the sale happens, the mortgage lender must apply the net proceeds to the debt and return any surplus to the mortgage provider or whoever is entitled to it. If the proceeds fall short, section 733 governs, and where the mortgage secured another person's debt the limit in section 727/1 applies.
This provision is genuinely useful where a property is worth more than the debt and interest is accruing faster than the borrower can manage. Rather than waiting to be sued, the borrower forces the mortgage sale, stops the interest clock and recovers the surplus.
The Shortfall Rule: Why a Mortgage Debt Often Ends at the Auction
Section 733 is the provision that surprises foreign borrowers most. If the mortgaged property is taken in satisfaction and is worth less than the sum owing, or if it is sold at auction for net proceeds less than the sum owing, the debtor is not liable for the shortfall.
Compare a mortgage with a pledge, where section 767 expressly leaves the debtor liable for the balance. The difference is deliberate: a mortgage lender chose to take the land as its security, and the law holds it to that choice.
Case in point — Supreme Court Judgment No. 3535/2007: the mortgage secured another company's unpaid tax liability and the parties had agreed nothing about a shortfall. The Court held that section 733 therefore applied in full, so the debtor was not liable for the deficiency, and expressly rejected the argument that section 733 is confined to cases where the debtor mortgaged its own property. It applies equally where one person has mortgaged property to secure another's debt.
Case in point — Supreme Court Judgment No. 8851/2008: there was no clause excluding section 733, so the judgment authorised only seizure and sale of the second defendant's mortgaged property and did not permit enforcement against other assets. Once that property had been sold, the creditor could not enforce against the first defendant's remaining assets even though the proceeds were insufficient.
The Clause Banks Put in Every Mortgage
Section 733 can be excluded by agreement, and mortgage lenders know it. A line stating that if enforcement of the mortgage does not realise enough, the borrower will pay the balance in full, reverses the default position.
Case in point — Supreme Court Judgment No. 7391/2004: the borrower argued that a clause allowing the bank to enforce against other assets after the mortgage auction was void as contrary to public order. The Court disagreed, holding that section 733 merely presumes the parties' intention, concerns only the parties themselves rather than the public interest, and is not a provision of public order or good morals. The parties may agree otherwise and the clause is enforceable. The same reasoning appears in Judgment No. 168/1975 and Judgment No. 1507/1995.
Case in point — Supreme Court Judgment No. 3803/2015: the Court again upheld a clause making both the borrower and the mortgage provider liable for the shortfall, treating it as an ordinary term of mortgage practice, and rejected the argument that it was an unfair contract term.
So the first question in any mortgage dispute is simply whether that clause is in your documents. If it is not, the claim may end at the auction.
Where That Mortgage Clause Is Now Void
This is the most important recent development, and it is why the older judgments above must be read with care.
Section 727/1 now provides that, in any case whatever, a person who mortgages their own property to secure a debt that somebody else must pay is not liable beyond the value of the mortgaged property at the time of enforcement or forfeiture. Any agreement making that mortgage provider liable beyond that limit, or liable as a guarantor, is void, whether it sits in the mortgage document or in a separate agreement.
There is one carve-out. Where the debtor is a juristic person and the mortgage was granted by a person with legal management power or control over that juristic person, and that person also signed a separate guarantee, the protection does not apply. Directors and controlling shareholders who mortgage personal property for company debt cannot use section 727/1 to escape a guarantee they signed.
For everyone else the practical effect is substantial. A foreign spouse, parent or investor who mortgaged a condominium to support a company loan is protected to the value of that unit, and a shortfall clause purporting to go further has no effect.
A Mortgage Can Outlive the Personal Debt
Borrowers sometimes assume that if the mortgage lender has run out of time to sue on the loan, the mortgage has gone too. It has not.
Case in point — Supreme Court Judgment No. 1507/1995: more than ten years had passed since judgment, so the creditor could no longer enforce against the debtor and the guarantor was accordingly released. The defendant nonetheless remained liable to the extent of the property he had mortgaged. The mortgage survived the personal claim.
The practical lesson is that an old, apparently dormant mortgage registered against a title is still live. Anyone buying property in Thailand should treat a registered mortgage as an enforceable burden regardless of its age, and insist on a release at the Land Office on the day of transfer.
Common Mistakes to Avoid
Ignoring the demand letter instead of checking whether the sixty-day period under section 728 was properly given.
Failing to ask whether the lender served the fifteen-day notice where the mortgage secured another person's debt.
Assuming the shortfall is automatically payable, without checking whether the mortgage excludes section 733.
Overlooking section 727/1, which caps a third party's exposure at the value of the mortgaged property and voids any clause going further.
Waiting to be sued while interest runs, instead of using section 729/1 to force an auction and recover the surplus.
Buying property without requiring the registered mortgage to be discharged at the Land Office on completion.
Frequently Asked Questions
How much warning must a lender give before enforcing a mortgage?
Written notice requiring payment within a reasonable period of not less than sixty days from receipt. Only after the debtor fails to comply may the mortgage lender ask the court to order seizure and sale.
The auction raised less than the loan. Do I have to pay the difference?
Under section 733, no. But your mortgage very likely contains a mortgage clause excluding that rule, and such clauses have been held enforceable. Where you mortgaged property for somebody else's debt, section 727/1 caps your liability at the property's value and voids any clause going further.
I mortgaged my condominium for my company's loan. What is my exposure?
Normally the value of the unit and no more. The exception is where you had management power or control over the company and also signed a separate guarantee, in which case the cap does not protect you.
Can I force the lender to sell rather than wait?
Yes, under section 729/1, once the debt is due and provided no other mortgage or registered preferential right exists over the property. The lender must then auction it within one year, apply the proceeds and return any surplus to you.
There is an old mortgage on a property I want to buy. Is it still enforceable?
Treat it as enforceable. A mortgage can survive even where the lender has lost the right to pursue the borrower personally, so require a registered discharge on the day of transfer.
Speak to a Thai Property and Banking Lawyer
Mortgage disputes in Thailand turn on documents and dates: whether the notice periods were observed, whether a shortfall clause exists, and whether the person who granted the mortgage was the borrower or a third party. Our team reviews the mortgage and the loan agreement, audits the lender's notices under sections 728 and 729/1, advises on exposure under sections 727/1 and 733, defends enforcement proceedings and negotiates restructuring or a controlled sale. We act for foreign borrowers, third-party mortgage providers, buyers of mortgaged property and private lenders in Phuket and throughout Thailand. Contact us as soon as a demand arrives, while the notice periods still matter.
Disclaimer
This article provides general legal information only and does not constitute legal advice. Mortgage outcomes depend closely on the wording of the mortgage and loan documents and on who granted the security. Please consult a licensed Thai attorney before acting on any matter with legal consequences.
A mortgage over Thai land or a condominium unit must be made in writing and registered with the competent official. An unregistered mortgage is void, which is why every genuine mortgage appears on the reverse of the title deed. That also means a title search tells you precisely what mortgage burdens a property carries before you buy it.
A mortgage is security over the property itself. It is not, by itself, a personal promise to pay the shortfall, and that distinction runs through everything below.
The Sixty-Day Notice a Mortgage Lender Must Serve
Section 728 of the Civil and Commercial Code is the gateway to enforcement. Before enforcing a mortgage, the mortgage lender must serve written notice on the debtor requiring payment within a reasonable period, which must be not less than sixty days from the date the debtor receives it. Only if the debtor fails to comply may the mortgage lender bring an action asking the court to order seizure of the mortgaged property and its sale by public auction.
This is not a formality. A mortgage enforcement action filed without a compliant notice, or on a notice giving less than sixty days, is open to attack. The first thing to do when a mortgage demand arrives is therefore to check the date of receipt and count the days, and to keep the envelope.
The Second Notice When You Mortgaged Property for Somebody Else
Many foreigners in Thailand are not the borrower on the mortgage at all. They have mortgaged a property to secure a company's loan, or a spouse's, or a business partner's. Section 728 paragraph two gives that person a distinct protection that is widely overlooked.
Where a person has mortgaged their own property to secure a debt that somebody else must pay, the mortgage lender must send the same notice to that mortgage provider within fifteen days of sending it to the debtor. If the lender fails to do so within those fifteen days, the mortgage provider is released from liability for interest, compensation and ancillary charges owed by the debtor which accrue after that fifteen-day period expires.
On a long-running default this can remove years of accumulated interest from the claim. It is worth asking the mortgage lender to produce proof of the date it served each notice.
Forcing a Mortgage Sale Without a Court Case
Section 729/1 gives the person who granted the mortgage a tool that very few borrowers know they have. At any time after the debt has fallen due, provided no other mortgage or registered preferential right exists over the same property, the mortgage provider may give the lender written notice requiring it to sell the mortgaged property by public auction without filing a court case. That notice is treated as consent to the auction, and the mortgage lender must carry out the sale within one year of receiving it.
If the mortgage lender does not sell within that year, the mortgage provider is released from liability for interest, compensation and ancillary charges accruing after the deadline passes. When the sale happens, the mortgage lender must apply the net proceeds to the debt and return any surplus to the mortgage provider or whoever is entitled to it. If the proceeds fall short, section 733 governs, and where the mortgage secured another person's debt the limit in section 727/1 applies.
This provision is genuinely useful where a property is worth more than the debt and interest is accruing faster than the borrower can manage. Rather than waiting to be sued, the borrower forces the mortgage sale, stops the interest clock and recovers the surplus.
The Shortfall Rule: Why a Mortgage Debt Often Ends at the Auction
Section 733 is the provision that surprises foreign borrowers most. If the mortgaged property is taken in satisfaction and is worth less than the sum owing, or if it is sold at auction for net proceeds less than the sum owing, the debtor is not liable for the shortfall.
Compare a mortgage with a pledge, where section 767 expressly leaves the debtor liable for the balance. The difference is deliberate: a mortgage lender chose to take the land as its security, and the law holds it to that choice.
Case in point — Supreme Court Judgment No. 3535/2007: the mortgage secured another company's unpaid tax liability and the parties had agreed nothing about a shortfall. The Court held that section 733 therefore applied in full, so the debtor was not liable for the deficiency, and expressly rejected the argument that section 733 is confined to cases where the debtor mortgaged its own property. It applies equally where one person has mortgaged property to secure another's debt.
Case in point — Supreme Court Judgment No. 8851/2008: there was no clause excluding section 733, so the judgment authorised only seizure and sale of the second defendant's mortgaged property and did not permit enforcement against other assets. Once that property had been sold, the creditor could not enforce against the first defendant's remaining assets even though the proceeds were insufficient.
The Clause Banks Put in Every Mortgage
Section 733 can be excluded by agreement, and mortgage lenders know it. A line stating that if enforcement of the mortgage does not realise enough, the borrower will pay the balance in full, reverses the default position.
Case in point — Supreme Court Judgment No. 7391/2004: the borrower argued that a clause allowing the bank to enforce against other assets after the mortgage auction was void as contrary to public order. The Court disagreed, holding that section 733 merely presumes the parties' intention, concerns only the parties themselves rather than the public interest, and is not a provision of public order or good morals. The parties may agree otherwise and the clause is enforceable. The same reasoning appears in Judgment No. 168/1975 and Judgment No. 1507/1995.
Case in point — Supreme Court Judgment No. 3803/2015: the Court again upheld a clause making both the borrower and the mortgage provider liable for the shortfall, treating it as an ordinary term of mortgage practice, and rejected the argument that it was an unfair contract term.
So the first question in any mortgage dispute is simply whether that clause is in your documents. If it is not, the claim may end at the auction.
Where That Mortgage Clause Is Now Void
This is the most important recent development, and it is why the older judgments above must be read with care.
Section 727/1 now provides that, in any case whatever, a person who mortgages their own property to secure a debt that somebody else must pay is not liable beyond the value of the mortgaged property at the time of enforcement or forfeiture. Any agreement making that mortgage provider liable beyond that limit, or liable as a guarantor, is void, whether it sits in the mortgage document or in a separate agreement.
There is one carve-out. Where the debtor is a juristic person and the mortgage was granted by a person with legal management power or control over that juristic person, and that person also signed a separate guarantee, the protection does not apply. Directors and controlling shareholders who mortgage personal property for company debt cannot use section 727/1 to escape a guarantee they signed.
For everyone else the practical effect is substantial. A foreign spouse, parent or investor who mortgaged a condominium to support a company loan is protected to the value of that unit, and a shortfall clause purporting to go further has no effect.
A Mortgage Can Outlive the Personal Debt
Borrowers sometimes assume that if the mortgage lender has run out of time to sue on the loan, the mortgage has gone too. It has not.
Case in point — Supreme Court Judgment No. 1507/1995: more than ten years had passed since judgment, so the creditor could no longer enforce against the debtor and the guarantor was accordingly released. The defendant nonetheless remained liable to the extent of the property he had mortgaged. The mortgage survived the personal claim.
The practical lesson is that an old, apparently dormant mortgage registered against a title is still live. Anyone buying property in Thailand should treat a registered mortgage as an enforceable burden regardless of its age, and insist on a release at the Land Office on the day of transfer.
Common Mistakes to Avoid
Ignoring the demand letter instead of checking whether the sixty-day period under section 728 was properly given.
Failing to ask whether the lender served the fifteen-day notice where the mortgage secured another person's debt.
Assuming the shortfall is automatically payable, without checking whether the mortgage excludes section 733.
Overlooking section 727/1, which caps a third party's exposure at the value of the mortgaged property and voids any clause going further.
Waiting to be sued while interest runs, instead of using section 729/1 to force an auction and recover the surplus.
Buying property without requiring the registered mortgage to be discharged at the Land Office on completion.
Frequently Asked Questions
How much warning must a lender give before enforcing a mortgage?
Written notice requiring payment within a reasonable period of not less than sixty days from receipt. Only after the debtor fails to comply may the mortgage lender ask the court to order seizure and sale.
The auction raised less than the loan. Do I have to pay the difference?
Under section 733, no. But your mortgage very likely contains a mortgage clause excluding that rule, and such clauses have been held enforceable. Where you mortgaged property for somebody else's debt, section 727/1 caps your liability at the property's value and voids any clause going further.
I mortgaged my condominium for my company's loan. What is my exposure?
Normally the value of the unit and no more. The exception is where you had management power or control over the company and also signed a separate guarantee, in which case the cap does not protect you.
Can I force the lender to sell rather than wait?
Yes, under section 729/1, once the debt is due and provided no other mortgage or registered preferential right exists over the property. The lender must then auction it within one year, apply the proceeds and return any surplus to you.
There is an old mortgage on a property I want to buy. Is it still enforceable?
Treat it as enforceable. A mortgage can survive even where the lender has lost the right to pursue the borrower personally, so require a registered discharge on the day of transfer.
Speak to a Thai Property and Banking Lawyer
Mortgage disputes in Thailand turn on documents and dates: whether the notice periods were observed, whether a shortfall clause exists, and whether the person who granted the mortgage was the borrower or a third party. Our team reviews the mortgage and the loan agreement, audits the lender's notices under sections 728 and 729/1, advises on exposure under sections 727/1 and 733, defends enforcement proceedings and negotiates restructuring or a controlled sale. We act for foreign borrowers, third-party mortgage providers, buyers of mortgaged property and private lenders in Phuket and throughout Thailand. Contact us as soon as a demand arrives, while the notice periods still matter.
Disclaimer
This article provides general legal information only and does not constitute legal advice. Mortgage outcomes depend closely on the wording of the mortgage and loan documents and on who granted the security. Please consult a licensed Thai attorney before acting on any matter with legal consequences.
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