Enforcing a Mainland China Judgment in Hong Kong: The 2026 Practical Guide
A Mainland court judgment is not automatically effective across the boundary, but a streamlined statutory route now exists. To enforce mainland judgment Hong Kong creditors register it in the High Court under the Mainland Judgments in Civil and Commercial Matters (Reciprocal Enforcement) Ordinance (Cap. 645), which commenced in 2024 and is far broader than the old regime. A time limit applies (generally two years), so delay can be fatal to your claim. This guide explains Cap. 645, the step-by-step registration process, the common mistakes, and when the older common-law route still matters.
Introduction
Cross-border business between Hong Kong and the Mainland generates cross-border debts, and a judgment won in a Mainland court is only as good as your ability to enforce it where the assets are. For many creditors, those assets are in Hong Kong. The good news is that it is now significantly easier to enforce mainland judgment Hong Kong-side than it used to be. The reciprocal enforcement HK China 2026 framework rests on a single statute, and this guide explains how the Cap 645 Hong Kong regime works in practice, from registration to the traps that catch creditors out. Because cross-border litigation HK has its own deadlines and exclusions, knowing the route in advance protects your judgment.
Cap. 645 overview
The Mainland Judgments in Civil and Commercial Matters (Reciprocal Enforcement) Ordinance (Cap. 645) commenced on 29 January 2024 and implements a broad mutual-recognition arrangement between Hong Kong and the Mainland. It is a major upgrade on the previous statutory route, the Mainland Judgments (Reciprocal Enforcement) Ordinance (Cap. 597) from the older 2008 Arrangement, which only covered money judgments where the parties had signed an exclusive choice-of-court agreement.
Under Cap. 645, the key features are:
● Wider scope. It covers a much broader range of civil and commercial judgments, without the old requirement for an exclusive jurisdiction clause.
● Registration, not re-litigation. You ask the Hong Kong Court of First Instance to register the Mainland judgment; you do not re-argue the merits.
● Once registered, it bites. A registered judgment is enforceable as if it were a Hong Kong judgment, including against the debtor's Hong Kong assets.
● Exclusions apply. Certain matters fall outside the regime (for example specified matrimonial and family matters, some insolvency, certain intellectual-property disputes and arbitration-related matters), so eligibility must be checked.
What counts, and what is excluded
Cap. 645 covers a broad range of civil and commercial judgments, which is the big change from the old regime, but "broad" is not "everything". The judgment must be a qualifying judgment from a qualifying Mainland court, and certain categories sit outside the scheme and need separate analysis. These commonly include specified matrimonial and family matters, some insolvency and debt-restructuring matters, particular intellectual-property disputes, and arbitration-related matters (which have their own mutual-enforcement arrangements). The judgment must also be final and enforceable in the Mainland; an interim or non-final decision will not qualify.
Why does this matter so much in practice? Because eligibility is the gateway. A creditor who assumes their judgment qualifies, and only discovers an exclusion after the time limit has run, may lose the streamlined route altogether and be left with slower alternatives. The disciplined approach is to confirm three things at the very start: that the judgment is within scope, that it is final and enforceable, and that you are inside the time limit. Get those right and the rest is largely administrative; get them wrong and even a strong judgment can become hard to enforce.
Step-by-step registration
1. Check eligibility. Confirm the judgment is a civil or commercial judgment within Cap. 645 and not within an excluded category.
2. Confirm it is final and enforceable in the Mainland. A judgment still subject to challenge may not qualify.
3. Mind the time limit. Apply to register within the statutory window (generally two years). This is the single most important deadline, and missing it can end your claim.
4. Prepare the papers. You typically need a certified copy of the judgment, a certificate from the Mainland court confirming it is final and enforceable, and certified translations where required.
5. Apply to the Court of First Instance to register the judgment, usually without notice to the debtor in the first instance.
6. Serve notice of registration on the judgment debtor once registered.
7. Allow the set-aside period. The debtor can apply to set aside registration on limited grounds, such as lack of jurisdiction, the judgment being obtained by fraud, want of due process, or conflict with Hong Kong public policy.
8. Enforce. After the set-aside period (or once any challenge fails), enforce as you would a Hong Kong judgment, for example by charging orders, garnishee proceedings or examination of the debtor.
Common mistakes to avoid
● Missing the time limit. The biggest risk by far. Treat the two-year window as a hard deadline and start early.
● Assuming every judgment qualifies. Excluded categories and non-final judgments do not get in.
● Defective documents. Missing the court's certificate of enforceability, or uncertified translations, will stall the application.
● Forgetting the debtor's right to set aside. Plan for a possible challenge and keep your evidence on jurisdiction and service.
● Trying to recover twice. You cannot enforce the same sum to over-recovery across two jurisdictions.
Recent themes
The defining feature of the landscape since Cap. 645 took effect is its breadth compared with what came before, which has made Hong Kong a more reliable place to collect on Mainland judgments. A live point of debate is whether the older common-law route, suing in Hong Kong on the Mainland judgment as a debt, survives alongside the statute and when a creditor might still use it (for instance for a judgment that falls outside Cap. 645). The prudent course in 2026 is to treat Cap. 645 as the primary route, check eligibility early, and take advice on whether any alternative, including the common-law claim, is available for a judgment the statute does not cover. This is an area where recognition foreign judgment HK principles and the new statute interact, so professional input is valuable.
The common-law route, and when it still matters
Before Cap. 645, a creditor could enforce a Mainland judgment in Hong Kong by suing on it as a debt at common law, obtaining a fresh Hong Kong judgment and then enforcing that. Cap. 645 now provides a faster, statutory registration route for judgments within its scope. The practical questions in 2026 are therefore: does my judgment fall within Cap. 645 (in which case registration is normally the route), or outside it (for example an excluded category), in which case the common-law claim or another mechanism may still be needed? Because the analysis is technical, and because the interaction between the statute and the older common-law route is still being worked through, this is a point to take advice on rather than assume.
A worked example
Suppose a Hong Kong company obtains a money judgment in a Mainland court against a trading counterparty that holds a bank account and an office in Hong Kong. The creditor checks that the judgment is a civil or commercial money judgment within Cap. 645, obtains a certified copy and the Mainland court's certificate confirming it is final and enforceable, arranges certified translations, and applies to the Court of First Instance to register it, comfortably inside the time limit. Once registered and after the set-aside period passes without a successful challenge, the creditor enforces against the Hong Kong bank account by garnishee proceedings. The lesson is that the regime rewards creditors who are organised and prompt, and punishes those who let the clock run.
FAQ
1. Can a Mainland judgment be enforced in Hong Kong?
Yes. Under Cap. 645 you can register a qualifying Mainland civil or commercial judgment in the High Court and then enforce it as a Hong Kong judgment.
2. How long do I have to apply?
A statutory time limit applies, generally two years. Confirm the precise deadline for your judgment and do not delay.
3. Do I have to re-argue my case in Hong Kong?
No. The process is registration, not a fresh trial. The debtor can only resist on limited grounds.
4. What kinds of judgment are excluded?
Certain matters, including specified family, insolvency, some intellectual-property and arbitration-related matters, fall outside Cap. 645 and need separate analysis.
5. Can the debtor fight registration?
Yes, on limited grounds such as lack of jurisdiction, fraud, lack of due process, or conflict with Hong Kong public policy.
6. What if my judgment is not covered by Cap. 645?
You may need to consider the common-law route or another mechanism. Take advice, as the analysis is fact-specific.
7. Does Cap. 645 cover arbitral awards?
No. Arbitral awards between Hong Kong and the Mainland are dealt with under the separate arbitration arrangements, not Cap. 645.
8. What documents will I need?
Typically a certified copy of the judgment, the Mainland court's certificate that it is final and enforceable, and certified translations where required.
9. Can the debtor stall by challenging the judgment in the Mainland?
The judgment generally needs to be final and enforceable. An ongoing Mainland challenge can affect eligibility, so confirm its status before applying.
When to contact a solicitor
Instruct a Hong Kong litigation solicitor as soon as you have a Mainland judgment and believe the debtor has Hong Kong assets. Early advice protects the time limit, confirms eligibility, and gets the documents right the first time.
Talk to ask.legal Hong Kong
Holding a Mainland judgment and need to collect in Hong Kong? Contact ask.legal Hong Kong to be matched with a Hong Kong litigation solicitor experienced in cross-border enforcement.
Sources and further reading
● Mainland Judgments in Civil and Commercial Matters (Reciprocal Enforcement) Ordinance (Cap. 645); Mainland Judgments (Reciprocal Enforcement) Ordinance (Cap. 597).
● Department of Justice, Cap. 645 information leaflet: https://www.doj.gov.hk/cap645/en/useful_information/pdf/doj_mainland_judgments_leaflet_en.pdf
About the author: prepared by the ask.legal Hong Kong editorial team.
Last updated: June 2026.
This article is general information about the law of Hong Kong as at 2026, not legal advice. For advice on your circumstances, consult a qualified Hong Kong legal practitioner.