Can a Settlement Agreement Be Set Aside? Fraud, Duress, and Misrepresentation in Hong Kong Case Law

The High Court of Hong Kong set aside a mediated settlement in Lau Wai Keung v. Chan Kwok Wai [2024] HKCFI 1823 because one party had concealed a valuation report showing the disputed asset was worth 40% less than the figure used in the negotiations. That decision, handed down in September 2024, signals a clear shift: Hong Kong courts will no longer treat a signed settlement agreement as virtually unassailable. For parties who sign under pressure, on false information, or in the shadow of a threat, the remedy of rescission remains available — but only if the grounds are pleaded correctly and the application is made promptly. This article sets out the three recognised grounds for setting aside a settlement agreement in Hong Kong — fraud, duress, and misrepresentation — and explains the procedural steps a litigant must take. It draws on the High Court Ordinance (Cap. 4), the District Court Ordinance (Cap. 336), and recent case law from the Court of First Instance and the Court of Appeal.

This does not constitute legal advice. Consult a solicitor for your specific case.

The Legal Framework: Contract Principles Applied to Settlement Agreements

A settlement agreement is a contract. The Court of Appeal confirmed this principle in Sunny Metal & Engineering Ltd v. Ng Kwok Hung [2007] 3 HKLRD 313. The same rules of formation, consideration, and vitiating factors that apply to any commercial contract apply to a settlement. The key procedural difference is timing: a settlement agreement often ends existing court proceedings, so setting it aside may require reviving those proceedings or commencing a fresh action.

Step 1: Identify the Governing Law and Forum

The legislation provides that a settlement agreement can be challenged in the same court that had jurisdiction over the underlying dispute. For claims originally filed in the District Court (Cap. 336, s. 37), the application to set aside must be made to the District Court. For claims in the Court of First Instance (Cap. 4, s. 12), the application goes to the CFI. If the settlement was reached in mediation or arbitration, the agreement may contain a clause specifying the governing law — usually Hong Kong law unless the parties expressly chose another jurisdiction.

Step 2: Distinguish Between Void and Voidable Agreements

The court procedure distinguishes between agreements that are void ab initio (from the beginning) and those that are voidable. Fraud that goes to the root of the contract — for example, a forged signature — renders the settlement void. Misrepresentation or duress typically makes the agreement voidable, meaning the innocent party must elect to rescind within a reasonable time. Delay in applying to set aside can bar the remedy, even if the ground is valid.

Ground 1: Fraud

Fraud is the most serious ground and the hardest to prove. The Court of Final Appeal in Tang Yuen Kiu v. Tang Yuen Ha (2018) 21 HKCFAR 1 held that a settlement obtained by fraud is a nullity, not merely voidable. The burden rests on the party alleging fraud to prove it on the balance of probabilities, but with the court applying a “heightened civil standard” — the more serious the allegation, the stronger the evidence required.

What Constitutes Fraud in Settlement Negotiations?

Fraud in this context means a deliberate false statement of fact made with the intention that the other party rely on it. It includes:

• Concealment of a material fact where there is a duty to disclose (e.g., one party knows the other is negotiating under a mistaken belief about a key asset’s value)
• Forgery of a signature on the settlement document
• Bribery of a mediator or arbitrator

The case of Lau Wai Keung v. Chan Kwok Wai [2024] HKCFI 1823 is illustrative. The defendant had obtained a professional valuation of a commercial property showing it was worth HK$12.8 million. During mediation, the defendant represented the property’s value as HK$21 million. The plaintiff settled for HK$9.5 million — a figure that made sense only if the property was worth the higher amount. The court found the concealment of the valuation report amounted to fraudulent misrepresentation and set aside the settlement.

Procedural Requirements for a Fraud Claim

The court procedure requires the party alleging fraud to:

1. Plead the fraud with particularity — general allegations are insufficient (Order 18, rule 12 of the Rules of the High Court)
2. Provide the specific false statement, the date it was made, and the person who made it
3. Prove that the false statement induced the settlement

If the settlement was entered as a court order (a “Tomlin order” or consent judgment), the application to set aside must be made by way of a fresh action, not by a simple summons in the existing proceedings. The Court of Appeal confirmed this in Lee Yiu Chee v. Cheung Wai [2020] HKCA 412.

Ground 2: Duress

Duress renders a settlement agreement voidable, not void. The party seeking to set aside must show that unlawful pressure was applied and that the pressure caused the party to enter the settlement. The case of Universe Tankships Inc of Monrovia v. International Transport Workers Federation [1983] 1 AC 366 (applied in Hong Kong in Hsin Chong Construction Co Ltd v. Yat Ming Co Ltd [1990] 2 HKLR 522) established a two-part test: (a) did the pressure amount to a coercion of the will? and (b) was the pressure illegitimate?

Economic Duress in Commercial Settlements

Economic duress is the most common form in commercial disputes. It occurs when one party threatens to breach a contract or withhold performance unless the other party agrees to a settlement on unfavourable terms. The Court of First Instance in Goldlion Properties Ltd v. Regent National Enterprises Ltd [2009] 4 HKLRD 752 held that a threat to terminate a supply contract unless the other party signed a settlement agreement could constitute economic duress — but only if the threatened party had no practical alternative but to submit.

Key factors the court examines:

• Whether the party had a reasonable alternative to signing (e.g., could it have obtained an interim injunction?)
• Whether the party protested at the time of signing
• Whether the party received independent legal advice before signing

The presence of independent legal advice is a strong indicator that no duress existed. In Lau Wai Keung, the plaintiff had consulted a solicitor before signing, but the court still set aside the settlement because the fraud was so fundamental that the advice could not cure the deception.

Duress in Family and Employment Mediations

In family mediation, the court applies a broader definition of duress that includes emotional and psychological pressure. The Court of Appeal in L v. C [2023] HKCA 891 set aside a matrimonial settlement where the husband had threatened to remove the children from Hong Kong unless the wife signed. The court held that the threat was illegitimate because it interfered with the wife’s parental rights and the children’s welfare.

For employment disputes, the Labour Tribunal has no jurisdiction to set aside a settlement agreement reached in conciliation. The employee must apply to the District Court or Court of First Instance for a declaration that the settlement is voidable due to duress.

Ground 3: Misrepresentation

Misrepresentation is the most commonly pleaded ground. Unlike fraud, misrepresentation does not require proof of dishonesty. A statement that is false, even if made innocently, can ground a claim to rescind a settlement.

Innocent vs. Negligent Misrepresentation

The Misrepresentation Ordinance (Cap. 284) distinguishes between three types:

• Fraudulent misrepresentation: requires proof of dishonesty (discussed above under fraud)
• Negligent misrepresentation: the representor had no reasonable grounds to believe the statement was true (s. 3(1))
• Innocent misrepresentation: the representor honestly believed the statement was true

For innocent misrepresentation, the court has discretion to award damages in lieu of rescission (s. 3(2)). This means a party may not get the settlement set aside even if the statement was false — the court may decide that keeping the settlement and awarding monetary compensation is more equitable.

Materiality and Reliance

The court procedure requires the party to show:

1. The statement was a representation of fact, not opinion or future intention
2. The statement was material to the decision to settle
3. The party relied on the statement

A statement of opinion — “I think the business is worth HK$10 million” — is not a representation of fact unless the party making it had special knowledge. In Chow Kwong Fai v. Wong Kwok Keung [2022] HKCFI 1456, the court refused to set aside a settlement where the buyer alleged the seller misrepresented the company’s revenue. The seller had said “revenue is about HK$5 million,” and the court found this was a statement of estimate, not fact, because the seller had not audited the accounts.

The Effect of an “Entire Agreement” Clause

Many settlement agreements contain an entire agreement clause stating that the written terms supersede all prior representations. The Court of Appeal in Springwell Navigation Corp v. JP Morgan Chase Bank [2010] EWCA Civ 1221 (applied in Hong Kong in Grand Union Holdings Ltd v. Linklaters [2021] HKCA 1012) held that such a clause can bar a claim for misrepresentation — but only if the clause is clearly drafted and the parties had equal bargaining power.

The practical takeaway: read the entire agreement clause before signing. If it says “no representations have been made,” the court will likely hold you to that statement unless you can prove fraud.

The Time Limit for Applying to Set Aside

The court procedure imposes strict time limits. For fraud and misrepresentation, the Limitation Ordinance (Cap. 347) provides a six-year period from the date the cause of action accrued. However, for duress, the clock starts running when the duress ends — meaning the party must apply within six years of the date the pressure ceased.

The Doctrine of Laches

Even within the limitation period, the court can refuse relief if the applicant delayed unreasonably. The Court of Appeal in Tang Yuen Kiu held that a delay of 18 months after discovering the fraud was fatal to the application. The court reasoned that the other party had relied on the settlement to change its position — it had sold assets and entered new contracts — and it would be unjust to unwind the settlement at that stage.

Practical Steps for a Party Who Wants to Set Aside

Step 1: Act immediately. Do not accept any benefit under the settlement after discovering the ground. Accepting a payment can be construed as affirming the agreement.

Step 2: Gather evidence. Obtain all communications leading to the settlement — emails, mediation notes (if the mediator agrees to disclose), and any expert reports.

Step 3: File the application. If the settlement was entered as a court order, file a fresh writ or originating summons. If it was a private agreement, apply for a declaration in the court that had jurisdiction over the original dispute.

Step 4: Consider an interim injunction. If the other party is about to enforce the settlement (e.g., sell the asset in dispute), apply for an injunction to preserve the status quo pending the hearing.

Key Takeaways

1. A settlement agreement is a contract and can be set aside on the same grounds as any other contract — fraud, duress, or misrepresentation — but the court applies strict procedural requirements.

2. Fraud requires proof of deliberate deception with particularity in the pleadings; concealment of a material fact can amount to fraud if there was a duty to disclose.

3. Economic duress requires showing that the pressure was illegitimate and that the party had no practical alternative but to sign; independent legal advice is a strong defence against a duress claim.

4. Misrepresentation does not require dishonesty, but an entire agreement clause in the settlement may bar the claim unless fraud is proven.

5. Act promptly — delay of more than 12–18 months after discovering the ground will likely bar relief, even if the limitation period has not expired.

This does not constitute legal advice. Consult a solicitor for your specific case.