Mareva Injunction Requirements in Hong Kong (2026): Tests, Disclosure, Undertakings & Worldwide Reach

Last reviewed: 24 June 2026

Hong Kong remains one of the most effective jurisdictions in the world for obtaining a Mareva injunction, a court order that freezes a defendant’s assets to prevent dissipation before judgment or award enforcement. Understanding the mareva injunction requirements is critical for any practitioner, in-house counsel or asset-recovery team contemplating interim relief in the Hong Kong Court of First Instance. Recent rulings in 2025 and 2026 have reinforced the court’s willingness to grant worldwide freezing orders in support of arbitral award enforcement under section 45 of the Arbitration Ordinance (Cap. 609), while simultaneously tightening the consequences for applicants who fail to make full and frank disclosure.

This guide maps every substantive test, procedural step and practical pitfall that counsel must navigate when seeking, or opposing, a Mareva injunction order in Hong Kong.

Executive Summary: The Mareva Injunction Requirements at a Glance

A Mareva injunction (also called a freezing order) restrains the disposal of assets so that a future judgment or arbitral award can be satisfied. Before the Hong Kong court will grant one, the applicant must satisfy four interdependent requirements:

1. Good arguable case, a cause of action that is more than merely arguable on its merits.
2. Real risk of dissipation, credible evidence that the defendant will move, hide or diminish assets to frustrate enforcement.
3. Assets within reach and adequacy, identification that assets exist within (or, for worldwide orders, outside) Hong Kong and that damages alone would be an inadequate remedy.
4. Undertakings and balance of justice, the applicant’s willingness to give an undertaking as to damages and the court’s assessment that, on balance, granting the order is just and convenient.

Hong Kong courts can extend these orders worldwide, including in aid of arbitral award enforcement under the Arbitration Ordinance (Cap. 609), s.45. Industry observers expect the trend toward stricter disclosure obligations to continue through 2026 and beyond.

What Is a Mareva (Freezing) Injunction?

A Mareva injunction is an interlocutory order issued by the High Court of Hong Kong prohibiting a party from disposing of, dealing with, or diminishing the value of specified assets up to a stated maximum sum. It takes its name from the landmark English decision in Mareva Compania Naviera SA v International Bulkcarriers SA [1975] 2 Lloyd’s Rep 509 and is now firmly embedded in Hong Kong practice under section 21L of the High Court Ordinance (Cap. 4).

The Mareva injunction is not the same remedy as a proprietary injunction or an Anton Piller (search) order. A proprietary injunction vs Mareva injunction comparison shows that the proprietary form protects a claimant’s title to specific assets, while the Mareva merely preserves the defendant’s assets generally so that a money judgment can be enforced. An Anton Piller order, by contrast, permits entry and search of premises to preserve evidence. All three remedies are frequently deployed together in fraud and asset-tracing cases, but each has distinct mareva injunction requirements and evidential thresholds.

The Legal Tests: Core Mareva Injunction Requirements in Hong Kong

The mareva injunction test in Hong Kong has been consistently applied by the Court of First Instance and the Court of Appeal. Four elements must be established, each of which must be supported by cogent evidence, usually presented by affidavit or affirmation.

Test 1, Good Arguable Case

The applicant must demonstrate a “good arguable case” on the merits of the underlying claim. This is a lower threshold than the balance of probabilities standard required at trial, but it is more than a bare assertion. The court will conduct a brief, non-dispositive review of the pleaded cause of action and the supporting evidence.

What counsel must show: A coherent statement of claim (or draft), key documentary evidence (contracts, correspondence, payment records), and, where the claim sounds in fraud, sufficient particulars to cross the threshold set out in Order 18, rule 12 of the Rules of the High Court.

Test 2, Real Risk of Dissipation

This is often the most contested element of the mareva injunction requirements. The applicant must adduce “solid evidence” of a real, as opposed to a fanciful, risk that the defendant will dissipate assets to frustrate enforcement. The court will look at factors including:

• Nature of the assets: Are they liquid (cash, securities, cryptocurrency) and therefore easily moved?
• History of the defendant: Previous defaults, evasive conduct, transfers to related parties or offshore jurisdictions.
• Jurisdictional risk: Are the defendant’s assets located in jurisdictions with weak enforcement frameworks?
• Speed and pattern of transactions: Unusual or accelerating transfers shortly before or after service of proceedings.
• Dishonesty in the underlying claim: Where fraud is alleged and supported by prima facie evidence, that itself may give rise to an inference of dissipation risk.

What counsel must show: A detailed affidavit exhibiting transactional evidence, corporate search results, and, where available, asset-tracing intelligence. Bare allegations of dishonesty, without supporting documentary evidence, will rarely suffice.

Test 3, Assets Within Reach and Adequacy of Alternative Remedies

The applicant should identify, with as much specificity as possible, the assets sought to be frozen and demonstrate that damages at trial would be an inadequate alternative remedy. In practice, this means showing that, absent a freezing order, a judgment in the applicant’s favour risks being rendered hollow because the defendant would have stripped its asset base.

For worldwide Mareva injunction Hong Kong applications, the court must also be satisfied that there is a risk that domestic assets alone would be insufficient to satisfy the claim.

Test 4, Undertakings, Security and the Balance of Justice

No Mareva injunction order is granted in a vacuum. The court must weigh the balance of justice between the parties, taking into account the potential hardship to the defendant of having assets frozen, the applicant’s mareva injunction undertaking as to damages, and the overall proportionality of the relief sought.

The undertaking as to damages is an indispensable element: the applicant promises to compensate the defendant (and affected third parties, such as banks) for any loss caused by the injunction if it is ultimately found to have been wrongly granted. In cases involving corporate applicants, the court may require fortification of this undertaking, for example, a payment into court, a bank guarantee or a standby letter of credit.

Procedural Route: Ex Parte vs Inter Partes and Timing

Understanding the procedural framework is as important as the substantive mareva injunction requirements. Hong Kong practitioners must decide, at the outset, whether to apply ex parte (without notice to the defendant) or inter partes (on notice).

When Ex Parte Applications Are Permitted

An ex parte application is the norm in Mareva cases because of the very nature of the relief: giving the defendant advance notice would defeat the purpose of the order. However, the applicant must satisfy the court that there is genuine urgency and that giving notice would likely cause the defendant to dissipate assets before the order takes effect.

Under the relevant mareva injunction practice direction and the Rules of the High Court (Cap. 4A), the standard procedural steps are as follows:

1. Draft the application and supporting affidavit, include the evidence for each of the four tests, a full asset schedule and the proposed order (usually based on the standard-form freezing order template endorsed by the judiciary).
2. Contact the Listing Office, request an urgent ex parte hearing before a judge of the Court of First Instance. Same-day or next-day listings are possible where genuine urgency is demonstrated.
3. Make full and frank disclosure, the applicant must disclose all material facts, including facts adverse to its case. Failure is sanctioned severely (see Section 8 below).
4. Attend the hearing, present the draft order, the affidavit evidence and the proposed undertaking as to damages. If the judge is satisfied, the order is sealed immediately.
5. Serve the order and return date, the order must be served on the defendant promptly (often within 48 hours), together with all supporting evidence. The order will include a return date, typically seven to fourteen days later, at which the defendant may apply to vary or discharge the injunction.

Service Out of the Jurisdiction

Where the defendant is outside Hong Kong, the applicant may need leave to serve the originating process out of the jurisdiction under Order 11 of the Rules of the High Court. For Mareva orders specifically, the court can grant interim relief even where the substantive dispute is governed by foreign law or is the subject of foreign proceedings, provided there is a sufficient connection to Hong Kong, such as the presence of assets within the jurisdiction.

Mareva in Aid of Arbitration and Enforcement of Awards

One of the most significant developments in recent years is the increasing use of Mareva injunctions in support of arbitral proceedings and enforcement of arbitral awards. Section 45 of the Arbitration Ordinance (Cap. 609) empowers the Court of First Instance to grant interim measures, including freezing orders, in relation to arbitral proceedings regardless of whether the seat of arbitration is in Hong Kong.

The Hong Kong Department of Justice has noted that these powers underscore the jurisdiction’s commitment to serving as a supportive court for international arbitration. The practical effect is that a party with an arbitral award, or even a pending arbitration, can apply for a Mareva injunction to preserve assets pending enforcement.

Key Guidance: Mareva in Support of Award Enforcement

Recent case guidance from the Hong Kong courts has clarified the approach to granting Mareva injunctions in support of enforcement proceedings for arbitral awards. The court has confirmed that the same four-limb test applies, but with certain adaptations:

• Good arguable case: Where an enforceable award already exists, this threshold is more easily met, the award itself constitutes strong evidence of the merits.
• Risk of dissipation: The court will examine whether the award debtor has resisted voluntary compliance or taken steps to restructure assets post-award.
• Proportionality: The court will consider the quantum of the award, the costs of compliance and any delay by the applicant in seeking enforcement.

This guidance, reflected in authoritative practitioner analysis, represents a practical endorsement of Hong Kong as an effective enforcement hub. Early indications suggest that award creditors are increasingly combining leave-to-enforce applications under section 84 of the Arbitration Ordinance with contemporaneous Mareva applications, creating a “one-two” enforcement strategy that limits the debtor’s window to dissipate assets.

Post-Judgment Mareva Injunctions

A post judgment mareva injunction operates on similar principles but arises after the court has entered judgment (or after leave to enforce an award has been granted). The applicant’s position is typically stronger because the merits of the claim have already been determined. However, the requirement to show a real risk of dissipation remains, judgment alone does not automatically justify a freezing order.

Worldwide Reach: Service Out, Jurisdiction and Enforcing Against Offshore Assets

A worldwide mareva injunction Hong Kong extends the freezing order to assets held anywhere in the world. This is a powerful remedy, but it carries additional mareva injunction requirements and practical challenges.

When Will the Court Grant Worldwide Relief?

The court will consider a worldwide order where:

• The defendant’s Hong Kong assets are insufficient to satisfy the claim.
• There is evidence that the defendant holds significant assets overseas.
• There is a real risk that those overseas assets will be dissipated.
• The applicant is willing to give enhanced undertakings, including an undertaking not to enforce the order abroad without first obtaining the leave of the Hong Kong court (the “Babanaft proviso”).

Enforcement Across Jurisdictions

The Freestanding Mareva Strategy

A “freestanding” Mareva, an injunction obtained in Hong Kong where the substantive proceedings are elsewhere, is a powerful cross-border enforcement tool. Under section 21M of the High Court Ordinance, the court can grant interim relief in aid of proceedings in any jurisdiction, provided there is a sufficient nexus (usually the presence of assets in Hong Kong). This strategy is increasingly used by international litigants and arbitration practitioners who need to freeze Hong Kong bank accounts or real property while pursuing substantive claims in other jurisdictions.

Practitioners considering a freestanding application should note that the court will scrutinise the nexus to Hong Kong closely and may impose conditions (such as requiring the foreign proceedings to be actively pursued) to prevent abuse of the process.

Norwich Pharmacal and Disclosure Orders

Before applying for a Mareva, asset-recovery teams frequently seek Norwich Pharmacal orders compelling third parties (typically banks or corporate service providers) to disclose information about the defendant’s assets. These orders are not a substitute for a Mareva, but they provide the evidentiary foundation upon which a freezing order application can be built.

Undertakings, Security and Drafting Practicalities

The mareva injunction undertaking as to damages is the central safeguard against oppressive use of freezing relief. Every applicant must give it, and the court retains discretion to require that it be fortified.

Standard Undertakings

The applicant typically undertakes to:

• Pay compensation for any loss caused to the defendant (and to innocent third parties, such as banks) if the injunction is subsequently discharged or the applicant fails at trial.
• Serve the order and evidence on the defendant within a stated period (usually 48 hours of sealing).
• Notify affected third parties (principally banks) of the terms of the order.
• Not use information obtained under the order for any purpose other than the proceedings.

Fortification and Security

Where the defendant challenges the adequacy of the applicant’s undertaking, the court may order fortification. Acceptable forms of security include:

• Payment into court.
• A first-demand bank guarantee from a reputable financial institution.
• A standby letter of credit.
• An after-the-event (ATE) insurance policy (though this is less commonly accepted in Hong Kong than in England).

Drafting tip: Proactively offer a reasonable form of fortification in the initial ex parte affidavit. This demonstrates good faith, reduces the risk of discharge at the return date, and expedites the hearing.

Consequences of Non-Disclosure and How to Avoid Pitfalls

The duty of full and frank disclosure is a cornerstone of all ex parte applications, and it is enforced with particular rigour in the context of Mareva injunctions. The applicant must disclose all material facts, including those adverse to its case, in the supporting affidavit. The standard is objective: would a reasonable solicitor consider the fact material to the judge’s decision?

Sanctions for Non-Disclosure

Failure to make full and frank disclosure can result in severe consequences:

Courts in Hong Kong have repeatedly emphasised that the duty exists to protect not only the defendant but also the integrity of the ex parte process itself. Even where the underlying merits of the case are strong, a material non-disclosure can be fatal to the injunction.

Practical Disclosure Checklist for Applicants

• Disclose any defence that the defendant has raised or is likely to raise.
• Disclose any limitation issues or weaknesses in the chain of evidence.
• Disclose any prior dealings or agreements with the defendant that could affect the balance of justice.
• Disclose any facts suggesting that the defendant’s assets are legitimately structured (e.g., trust arrangements, regulatory requirements).
• Disclose any delay by the applicant in bringing the application, with an explanation.

Practical Evidence Checklist and Sample Forms

The following checklist summarises the core documents and evidence that should be assembled before filing a Mareva application. These are for guidance only and should be adapted to the specific facts of each case.

Pre-Application Evidence Checklist

• Witness statement / affidavit: Sworn by a person with first-hand knowledge of the underlying facts. Must address each of the four tests, the full and frank disclosure duty, and the proposed undertaking.
• Draft statement of claim (or issued writ and statement of claim), demonstrating the good arguable case.
• Asset identification evidence: Bank records, land registry searches (Hong Kong Land Registry), corporate registry searches (Companies Registry), securities filings, and any asset-tracing reports from investigators.
• Evidence of dissipation risk: Transaction records showing unusual transfers, corporate restructuring filings, correspondence suggesting planned asset moves, prior default history.
• Draft freezing order: Based on the standard-form freezing order template endorsed by the Hong Kong Judiciary, tailored to the assets and parties in question.
• Undertaking as to damages: Draft wording of the applicant’s undertaking, with evidence of capacity to honour it (e.g., audited accounts or a bank guarantee).
• List of third parties to be notified: Banks, custodians, corporate service providers who hold the defendant’s assets.
• Adverse facts schedule: A separate internal schedule (for counsel’s review) listing all facts that might count against the application, with a note on how each is addressed in the affidavit.

Note: Template affidavits and sample undertaking wording can be adapted from the standard-form orders published by the Hong Kong Judiciary. These templates are provided for guidance only and do not constitute legal advice.

Conclusion: Five Pragmatic Steps for In-House Counsel

Meeting the mareva injunction requirements in Hong Kong demands both legal precision and operational speed. For in-house counsel facing a potential asset-dissipation crisis, the following five steps provide a practical roadmap:

1. Preserve records immediately. Secure all contracts, communications and transactional data before the counterparty becomes aware of impending proceedings.
2. Instruct litigation counsel urgently. Prepare the affidavit and draft order as early as possible, same-day or next-day hearings are achievable but require advance preparation.
3. Engage asset-tracing investigators. Professional investigators can identify bank accounts, property holdings and corporate structures that form the evidential backbone of the dissipation-risk argument.
4. Propose undertakings and security proactively. Offering fortification at the outset signals good faith and reduces the risk of delay or discharge at the return date.
5. Consult experienced Hong Kong commercial litigation lawyers who can navigate the procedural requirements, draft compliant orders and manage the cross-border dimensions of worldwide freezing relief.

This article is published for general informational purposes only and does not constitute legal advice. Readers should consult qualified legal counsel in Hong Kong before taking any action based on its contents.

Sources

1. Department of Justice (HK), Speech on Interim Measures and the Arbitration Ordinance
2. Bird & Bird, Attachment (Freezing) Orders in Hong Kong: Overview
3. Timothy Loh LLP, Practitioner Guide to Freezing Orders
4. Bryan Cave Leighton Paisner (BCLP), HK Court Guidance on Mareva in Aid of Arbitral Awards
5. Hong Kong Judiciary, Civil Justice Reform: Interim Remedies
6. Withers, Freestanding Mareva Injunctions: A Strategy for Cross-Border Disputes
7. Hong Kong e-Legislation, Arbitration Ordinance (Cap. 609) and High Court Ordinance (Cap. 4)
8. Community Legal Information Centre (CLIC) HK, Civil Case Q&A
9. Haiwen & Partners, Asset Preservation Within Hong Kong