Enforcing Mainland China Judgments in Hong Kong: The Cap. 645 Regime

A Mainland judgment is, for most of its life, a Mainland problem. The moment your judgment debtor's assets sit on the Hong Kong side of the boundary — a flat in Kowloon, shares in a Hong Kong holding company, money in a Hong Kong bank account — it becomes a Hong Kong problem, and for decades Hong Kong law handled that problem awkwardly. The common-law route was slow and shadowed by doubts about whether a Mainland judgment could ever be called truly final; the first statutory scheme was drawn so narrowly that hardly anyone could use it. That era ended on 29 January 2024, when a dedicated registration regime came into force.

We have written separately about enforcing foreign judgments in general — the reciprocal registration statutes, the common-law action on the judgment debt, and the defences a debtor can raise. This article is about something deliberately different. Judgments from the Mainland generally do not travel to Hong Kong by those ordinary routes: they cross by a bespoke statutory bridge, the Mainland Judgments in Civil and Commercial Matters (Reciprocal Enforcement) Ordinance (Cap. 645), and if you hold a Mainland judgment against a debtor with Hong Kong assets, this is almost certainly the regime you will use.

This guide explains what changed in January 2024, which Mainland judgments qualify and which are shut out, how registration in the Court of First Instance actually works, the grounds on which a debtor can attack a registration, the two-year time limit that catches out latecomers, and the reverse journey — enforcing a Hong Kong judgment in the Mainland.

Why Mainland judgments have their own regime

Hong Kong's general registration statute, the Foreign Judgments (Reciprocal Enforcement) Ordinance (Cap. 319), applies to a list of designated foreign jurisdictions — and the Mainland, being part of the same country, was never on it. For years a creditor holding a Mainland judgment therefore had to fall back on the common law: issue fresh proceedings in Hong Kong on the judgment debt and hope for summary judgment.

That route carried a peculiar difficulty. A judgment is only enforceable at common law if it is final and conclusive, and Mainland civil procedure allows a judgment to be reopened through a supervisory retrial process even after the ordinary appeals are exhausted. Hong Kong courts wrestled with whether that made Mainland judgments insufficiently final, and debtors exploited the doubt. Enforcement was possible, but slower, costlier and less certain than it should have been between two parts of one country.

The first statutory fix was modest. An arrangement signed in 2006 was implemented by the Mainland Judgments (Reciprocal Enforcement) Ordinance (Cap. 597), in force from 2008. It allowed registration — but only of money judgments, only in disputes arising from commercial contracts, and only where the parties had signed a written agreement choosing the Mainland courts exclusively. Employment contracts and consumer contracts were excluded altogether. Because exclusive Mainland jurisdiction clauses were rare in cross-boundary dealings, the scheme was little used, and most creditors were still stuck with the common law.

The breakthrough came with a much broader arrangement signed in January 2019 between the Supreme People's Court and the Hong Kong government. Hong Kong implemented it through Cap. 645 and its companion rules, which commenced on 29 January 2024 and superseded the old choice-of-court scheme for the future.

What changed on 29 January 2024

Cap. 645 is not a tweak. It rebuilds the bridge, and four changes matter most.

The exclusive choice-of-court requirement is gone. You no longer need a contract clause nominating the Mainland courts exclusively. The new regime asks instead whether the Mainland court had a prescribed jurisdictional connection with the dispute — for example, that the defendant resided in the Mainland when the case was accepted (or had an establishment there from whose activities the dispute arose), that the contract was to be performed there, that the tort was committed there, that the parties agreed (even non-exclusively) to Mainland jurisdiction, or that the defendant submitted by defending the merits without contesting jurisdiction.
Non-monetary relief can now travel. The old scheme and the common law enforced money judgments only. Under Cap. 645, both monetary and most non-monetary relief in qualifying civil and commercial judgments can be registered — a significant expansion for creditors holding orders that compel a party to do something rather than simply pay.
The subject matter is far wider. The regime reaches civil and commercial matters generally, including employment and labour disputes the old ordinance expressly excluded, civil damages awarded in Mainland criminal proceedings, and — for the first time, though with carve-outs — certain intellectual property judgments.
Finality is handled by statute, not case law. The question is whether the judgment is legally effective in the Mainland, evidenced by a certificate from the Mainland court, rather than a common-law argument about whether the retrial system destroys finality.

One transitional trap deserves a flag: where the parties signed an exclusive choice of Mainland court agreement before 29 January 2024, a judgment founded on it may still fall to be dealt with under the old regime rather than the new one. If your underlying contract predates the commencement date, check which scheme governs before you file anything.

Which judgments qualify — and which do not

The starting point is a judgment of the Mainland People's Courts in a civil or commercial matter that is legally effective in the Mainland. Effectiveness matters more than the level of court: a first-instance judgment that was never appealed can qualify just as a final appellate judgment can. Civil compensation ordered in a criminal case is within the scheme.

The exclusions are just as important, because filing under the wrong regime wastes months. Matters outside Cap. 645 include, among others:

Matrimonial and family cases — these have their own dedicated channel under the Mainland Judgments in Matrimonial and Family Cases (Reciprocal Recognition and Enforcement) Ordinance (Cap. 639), not Cap. 645;
Insolvency, bankruptcy and corporate debt-restructuring matters;
Succession and the administration of estates;
Certain intellectual property matters — the scheme admits some IP judgments, but disputes over the validity of registered rights and some patent infringement matters stay outside;
Arbitration-related judgments — rulings on the validity of an arbitration agreement or the setting aside of an award are excluded, and arbitral awards themselves cross the boundary under an entirely separate arrangement that this article does not cover;
Certain specialised maritime and administrative cases.

Two further limits catch people out. First, where a Mainland award includes a punitive or exemplary element beyond compensation for actual loss, that element generally cannot be registered — the compensatory core travels, the punitive topping does not. Second, if the Mainland proceedings are reopened — a retrial is ordered after you register — the Hong Kong court can set aside the registration or hold matters over until the Mainland position is settled. A judgment under active attack at home is a shaky foundation abroad.

Registering in the Court of First Instance

Registration is sought in the Court of First Instance of the High Court, ordinarily by an application made without notice to the judgment debtor, supported by affidavit evidence. The court is not re-trying the dispute; it is checking that the statutory conditions are met. If they are, it makes a registration order, and the judgment is then treated for enforcement purposes as if it were a judgment of the Hong Kong court.

The documents you need

The supporting evidence does the heavy lifting, and it is worth assembling before you brief anyone. Expect to need:

a certified copy of the Mainland judgment, sealed by the court that gave it;
a certificate from the Mainland court confirming that the judgment is legally effective — and, where required, enforceable — in the Mainland;
evidence of what remains unpaid, including any interest claimed; and
affidavit evidence establishing the jurisdictional connection and the other statutory conditions.

Obtaining the certificate of effectiveness from the original Mainland court can take longer than expected, especially for older judgments. Start that process first, not last. A modest court fee applies on filing; check the current schedule when you file.

The two-year window

Here is the deadline that matters. An application to register must generally be made within two years — running, broadly, from the date the judgment takes effect, or, where the judgment allows the debtor a period to perform, from the end of that period. That is dramatically shorter than the windows that apply under Hong Kong's general foreign-judgment regimes, and it mirrors the Mainland's own short enforcement limitation. A creditor who spends a year negotiating, another year hoping, and then turns to Hong Kong has quietly lost the statutory route.

Notice, the set-aside window and enforcement

Because the registration order is made without the debtor being heard, fairness comes afterwards. The order must be served on the judgment debtor with notice of the registration, and the debtor then has a short period, fixed by the order, to apply to set the registration aside. Enforcement waits until that window has closed or any set-aside application has failed. Once it has, the full domestic enforcement machinery opens up.

Grounds for setting aside registration

A debtor cannot reargue the merits — the Hong Kong court will not sit as a court of appeal from Shenzhen. But the statutory grounds of challenge are real, and sophisticated debtors use them. The main grounds include:

the Mainland court lacked the required jurisdictional connection with the dispute under the scheme's rules;
the debtor was not duly summoned, or was summoned but denied a reasonable opportunity to be heard — the natural justice ground;
the judgment was obtained by fraud;
the Mainland proceedings were brought in breach of a valid arbitration agreement or jurisdiction agreement covering the dispute;
a Hong Kong court has already given judgment on the same dispute, or recognised another judgment or award on it — the inconsistent judgment ground;
the judgment has been reversed or set aside on appeal or retrial in the Mainland; or
registration would be contrary to the basic principles of Hong Kong law or public policy.

The pattern will be familiar to anyone who has read about foreign-judgment defences generally: these are gateway objections, not a rehearing. The burden of making them out sits on the debtor, and bare assertions of unfairness in the Mainland proceedings will not do — the debtor needs evidence, usually from the Mainland court file itself.

Interim relief in aid of registration

A registration application telegraphs your intentions. A debtor who learns that its Hong Kong assets are about to come within reach can move money out of the jurisdiction faster than any court can process an application — which is why the scheme allows the Hong Kong court to grant interim relief, including injunctive relief, in connection with a registration application that has been made or is about to be made.

In practice, where there is a real risk of dissipation, the sequence is: freeze first, register second. A freezing order obtained without notice holds the assets in place while the registration and any set-aside skirmish run their course. The usual price of that relief — full and frank disclosure, a cross-undertaking in damages — applies with full force, so it is not a step to take lightly, but for a creditor facing a mobile debtor it is often the step that decides whether the judgment is ever worth anything.

The reverse direction: Hong Kong judgments in the Mainland

The bridge carries traffic both ways, and for Hong Kong businesses this may be the more valuable lane. A creditor holding a legally effective Hong Kong judgment in a civil or commercial matter can apply to the competent Intermediate People's Court — broadly, one connected to the parties' domicile or to the place where the respondent's property sits — producing a certified copy of the judgment together with a certificate from the Hong Kong courts confirming its effectiveness. The Mainland side applies its own short enforcement time limit, so the same discipline about the clock applies.

The refusal grounds mirror those described above — improper service, fraud, inconsistent judgments, breach of an arbitration or jurisdiction agreement, and public policy tested against Mainland law. And the scheme contemplates a creditor pursuing enforcement on both sides of the boundary at once, provided the total recovered does not exceed the judgment debt. For a debtor with assets scattered across Guangzhou and Central alike, that parallel pressure is precisely the point of the arrangement.

Strategy for judgment creditors

The regime rewards preparation more than aggression. A practical sequence:

Confirm effectiveness and get the certificate early. The Mainland court's certificate is the keystone document, and it is the one you cannot generate yourself.
Map the Hong Kong assets before you file. Land searches, company searches and a hard look at where the debtor banks tell you whether registration is worth the candle — and whether you need a freezing order first.
Diarise the two-year deadline the day judgment takes effect. Settlement talks do not stop the clock.
Anticipate the set-aside fight. Gather your evidence of proper service in the Mainland proceedings and of the jurisdictional connection now, while the court file is fresh, not after the debtor's summons lands.
Plan the endgame. Registration is a licence to enforce, not recovery itself. From there the ordinary tools apply: charging orders over Hong Kong land, garnishee proceedings intercepting debts owed to the debtor, examination of the debtor, and, where appropriate, insolvency pressure. Our guide to charging orders and third-party debt orders explains how the equivalent tools work in practice once a judgment is in hand.

The deeper shift is strategic. Before 2024, a Mainland judgment was often treated, commercially, as a bargaining chip rather than an instrument — something to wave in negotiation because enforcing it in Hong Kong was slow and uncertain. Cap. 645 changes the arithmetic. A qualifying Mainland judgment is now, within two years, convertible into a Hong Kong judgment on paper-based application, and debtors who assumed the boundary would protect their Hong Kong assets are learning otherwise. If you hold such a judgment — or you are the debtor served with notice of one — ask CommonBench's Legal Chat to work through the qualifying conditions, the set-aside grounds and the deadlines against your specific facts.

This article is published by CommonBench for informational purposes only and does not constitute legal advice. If you are working out how to turn a Mainland judgment into actual recovery against Hong Kong assets, or how to resist a registration served on you, try CommonBench — AI-powered legal research with verified citations across five common law jurisdictions.