While Hong Kong's common law legal system is well established, highly regarded and operates independently from mainland China and Chinese law, its class actions framework remains rather rudimentary in comparison. Unlike a number of other jurisdictions with similarly advanced legal systems, Hong Kong currently does not have specific laws governing class actions or a set of procedures providing for separate forms of class action litigation. The Hong Kong procedures are modelled on the former English representative proceedings applicable in England prior to the enactment of the Civil Procedure (Amendment) Rules 2000.2

Multiparty proceedings in Hong Kong are governed by Order 15, Rule 12 of the Rules of the High Court (RHC), which provides:

Where numerous persons have the same interest in any proceedings . . . the proceedings may be begun, and, unless the Court otherwise orders, continued, by or against any one or more of them as representing all or as representing all except one or more of them.3

Order 15, Rule 12 of the RHC also provides that the court may appoint a defendant as the representative defendant.4 The court's judgment would then be binding on all those persons represented by the representative plaintiff or representative defendant, as the case may be. There are equivalent provisions for representative actions in the District Court, which has jurisdiction for matters exceeding HK$50,000 but below HK$1 million.5 There is also a provision for appointing a representative plaintiff in the Small Claims Tribunal, which has jurisdiction for matters not exceeding HK$50,000.6

Institutional support for amending the current class actions regime started to gain traction with the release of the Final Report by the Chief Justice's Working Party on Civil Justice Reform (the CJR Report) in March 2004. The CJR Report called for Hong Kong to adopt a dedicated scheme for multiparty litigation. This resulted in the Law Reform Commission of Hong Kong (LRC) taking up the topic for consideration. In May 2012, the LRC released its Report on Class Actions (the LRC Report) in which it considered the multiparty litigation models adopted by various jurisdictions, including Australia, Canada, England and Wales, and the United States. The LRC recommended that Hong Kong introduce a multiparty litigation model that used an opt-out approach. In other words, once the court certifies a case as suitable for a class action suit, the members of the class would be automatically bound by the outcome, unless they indicated that they wish to be excluded from the action, save and except for those actions involving a foreign plaintiff, in which case an opt-in approach should be used instead. A judgment or order given by the court shall not be enforced against any person who is not a party to the proceedings except with the court's permission.7

Further, the LRC also proposed phasing the implementation of class action mechanism by starting first with consumer cases – with funding made available through a Consumer Legal Action Fund (the Fund) managed by the Hong Kong Consumer Council for class action proceedings arising from consumer claims. In this regard, the Fund is intended to give greater consumer access to legal remedies by providing financial support and legal assistance.

However, the Hong Kong Department of Justice (DOJ) is still in the process of exploring the LRC's recommendations on class action suits. At the time of publication, no legislative bill has been drafted for submission to the Hong Kong Legislative Council (the LegCo) for debate and consideration.


As mentioned above, the implementation of a class action regime in Hong Kong has stalled of late. In May 2012, the DOJ set up a cross-sector working group chaired by the Solicitor General (and an associated subcommittee) to study the LRC's class action proposals and to make recommendations to the Hong Kong government. As at 24 June 2019, the working group had held 25 meetings and its subcommittee had held 31 meetings but neither has yet given its recommendations.

Despite the proposal to make funding available to consumer-claims class action litigants, there is no concrete plan or legislation to implement the proposal. The reply by the Acting Secretary for Commerce and Economic Development, Dr Bernard Chan, to the Honourable Mr Holden Chow, a member of the LegCo, stated that so far there have been eight applications with similar causes of action and the Fund arranged for the cases to be heard at the same time. However, in the absence of a class action regime, none of the cases assisted by the Fund is a class action case.8

In April 2019, Ms Teresa Cheng, SC, the Secretary for Justice, in reply to the Honourable Mr Dennis Kwok, a member of the LegCo representing the legal functional constituency, stated that although there is not yet a specific timetable for consulting the public, the secretariat of the working group has started compiling a draft consultation document in parallel with and based on the research papers and deliberations of the working group, and the working group has started reviewing the draft. Ms Cheng further stated that the draft consultation document proposes to cover seven specific issues:

  1. a close scrutiny of the LRC's proposed definitions of 'consumer' and 'consumer cases';
  2. how potential litigants may be included (or excluded) from an intended class action;
  3. the procedural features of a workable proposed class action regime that would also achieve the stated policy objectives of the regime;
  4. the interface of litigation by way of class action with other forms of dispute resolution;
  5. appropriate mechanisms for determining class action awards and distributing them fairly among the class members;
  6. cost implications; and
  7. the resulting draft bill.9

Recent events in Hong Kong have highlighted the need for Hong Kong to have a more developed legal mechanism for class actions. For example, following the discovery in 2015 that drinking water in certain public housing estates was contaminated by heavy metals, the Honourable Mr Dennis Kwok wrote to the local media to suggest that a class action model would have been the most effective procedure for resolving claims from numerous affected occupants against the Housing Authority and responsible contractors.10

In 2016, the gym chain California Fitness closed down all its outlets overnight and, as at the time of writing, still owes approximately HK$20.8 million to nearly 27,000 former members, in the form of unused gym access fees and unredeemed training sessions. In the absence of a class actions regime, the prospect for these individuals to pursue their claims and be compensated remains bleak.

The introduction of a class action regime has also been linked to Hong Kong's recent push to safeguard against anticompetitive practices. Similarly to victims in consumer claims, victims of anticompetitive practices may present en masse, all claiming for relatively small amounts. Thus, the introduction of a class actions regime would most likely be seen as a positive development aimed at promoting a fairer economy.11 While the Competition Ordinance has been in effect since late December 2015, the class action reform proposal continues to stall at the consultation stage. It remains a missed opportunity that the two complementary mechanisms are still unable to operate in tandem to allow victims of anticompetitive practices collective redress through a class action procedure.

There were no significant developments in 2019 for reforming Hong Kong's class action regime.


i Types of action available

Representative plaintiff

For proceedings involving a representative plaintiff, RHC Order 15, Rule 12 provides that where numerous persons have the 'same interest', they may commence proceedings by nominating a representative plaintiff to represent all of them. The only exceptions are proceedings involving: (1) the estate of a deceased person; (2) property subject to a trust; and (3) the construction of a written instrument including legislation; each of these is excluded from the representative proceedings regime.

The crucial element in considering whether RHC Order 15, Rule 12 has been satisfied is whether the representative plaintiff has the same interest as the other plaintiffs. The Hong Kong courts have identified a 'threefold test' to assess whether the same-interest threshold is met: (1) common interest; (2) common grievance; and (3) seeking a remedy that is beneficial to all.12

The common-interest element was traditionally extremely difficult to satisfy. The representative plaintiff originally had to establish that: (1) the same contract applied between all members of the represented class and the defendant; (2) the defendant would rely on the same defences against all members of the class; and (3) the same relief was being claimed by all the class members.13 If, for example, the defendant could show that he or she had a separate defence against even one of the members, then the common-interest part of the test would not be satisfied.14 Further, the requirement that the same relief shall be claimed by each plaintiff meant that in practice, equitable relief (and not damages, which would more than likely be different for each plaintiff) was the only relief that could effectively be granted in representative proceedings.15

The courts have since moved to relax the strict interpretation with the aim of making representative actions 'not a rigid matter of principle but a flexible tool of convenience to facilitate the administration of justice'.16

Instead of requiring a common interest, it is now sufficient that there is a common ingredient or some common element in the causes of action of the represented class members.17 If the representative plaintiff succeeds in his or her claim, then the defendant would be barred from challenging those common ingredients or elements on the principle of res judicata. The other class members would only need to establish the other elements in their own separate proceedings.18 The same-contract requirement is also no longer a prerequisite for commencing representative proceedings19 and it is accepted that members within the represented group may have different degrees of interest.20 The impediment of a defendant raising separate defences against different class members is also no longer a bar to bringing representative proceedings.21

If a representative plaintiff discontinues his or her individual claim for any reason, the court may add or substitute him or her with any person in the represented class. To avoid the claim being time-barred if the addition or substitution occurs after the limitation period for the relevant claim has expired, the new plaintiff is treated as having been the representative plaintiff at the date of the original writ.22

Representative defendant

The same-interest requirement also applies to the appointment of a representative defendant. Therefore, the legal principles discussed above for representative plaintiffs are equally applicable to representative defendants. However, where separate defences exist for some but not all members, the same-interest requirement will not be met.23

The appointment of the representative defendant may only be made by the court on the application of the plaintiffs (discussed in greater detail below).

ii Commencing proceedings

Representative plaintiff

The individual (or individuals) claiming to represent others with the same interest should commence proceedings as the representative plaintiff or plaintiffs. The representative plaintiff is not required to seek leave of the court or an order of the court to act as the representative plaintiff. He or she may also act as the representative plaintiff on his or her own volition without first seeking the consent of those he or she purports to represent.24 The representative plaintiff's writ must clearly and precisely define the class being represented.25 The court must also be satisfied that the same-interest test has been met. The court will continually review whether the same-interest test is met as the case develops, and may order the representative proceedings to be dismissed if it is not.26

A representative plaintiff action is suitable if there are a large number of plaintiffs with the same interest. If there are only a few members in the defined class, the court may, in the absence of any other acceptable justification, order that all members be added as plaintiffs to the action instead.27 There is no set number required, but a class that consists of five or fewer members is unlikely to suffice.28

If a person who falls within the member class is to be excluded, that fact has to be included in the description of the class and the excluded persons must be made parties in their personal capacity. It is not possible to state in the writ that the representative plaintiff acts for some of the members of the class without specifying who those members are.29

Representative defendant

An application for the appointment of a representative defendant can be made by the plaintiffs at any stage of the court proceedings. The application must be made by a writ of summons and the representative capacity of the defendant should be endorsed on the writ.30 The representative application would usually be heard before a master, as opposed to a judge.

As with the criteria for representative plaintiffs, the court will consider whether there are sufficiently numerous defendants with the same interest such that it is appropriate to make the representative order.

The court retains the ultimate discretion in selecting the representative and will make a representation order for those it considers most proper, even if it is inconsistent with the choice made by the plaintiffs and defendants.31 The court has the power to compel a defendant to be the representative defendant if it determines that defendant is the most suitable candidate, irrespective of whether that defendant wishes to be the representative defendant.32

iii Defining the class

The potential plaintiffs must satisfy the court that their choice of candidate for representative plaintiff or representative defendant has sufficient interests in common with the class of individuals the potential plaintiffs contend the representative plaintiff or representative defendant represents. It is possible, in principle, for overseas plaintiffs to be included provided that they share the same interest as the representative plaintiff.

iv Binding effect on the class

A judgment or order given in a representative proceeding will be binding on all members represented by the representative plaintiff or representative defendant.33 This also applies to judgments in default, and to judgments delivered after trial. However, an individual bound by the judgment in default could apply to be added to the action and then apply for the judgment in default to be set aside. In contrast, a judgment properly rendered at trial can only be challenged by the represented member on appeal.

The binding nature of the representative proceedings together with the lack of consent required from class members before a representative plaintiff commences proceedings mean that it will fall upon the individual members to opt out by ensuring they are specifically excluded from the representative action when the writ is served.

v Procedural rules


Leave of the court is required to enforce a judgment against an individual who is not a party to the proceedings but who is a member being represented. The application for leave will be made by way of summons before a master and must be served personally on the individual against whom the judgment is to be enforced.34

The individual member cannot challenge the validity or binding nature of the judgment. Nor can he or she put forward any defence that could have been (but was not) raised in the proceedings. He or she can only challenge enforceability on the ground that the facts and matters in his or her particular case meant he or she, in fact, fell outside the definition of the class being represented and therefore the judgment should not be binding on him or her.

Size of the class

The size of the class should be determined at the outset by the plaintiffs' use of a clear definition of the class being represented. The definition will be put forward when serving the writ through the representative plaintiff, or when making the representative application for appointment of a representative defendant. The court's concern generally is whether the represented class is large enough such that it is appropriate to make use of the representative proceedings mechanism. As discussed in Section III.ii, a class consisting of five or fewer members is likely to be too small. If the class is too small, or the definition is not clearly defined or the court otherwise concludes that the representative method is wholly inappropriate in the circumstances, the court may order that the proceedings be dismissed.

Judge or jury

Apart from cases involving defamation, all civil actions in Hong Kong are heard by a single judge.

Speed of the litigation

The speed of the litigation for the representative proceedings will vary depending on the usual factors, such as the cause of action, the issues, the facts and the court diary. One of the principal aims of representative proceedings is to save time and resources by making the representative action binding on all represented members, such that, once that judgment is obtained, represented members are estopped from relitigating common elements in their own proceedings.

Liability and quantum

As discussed above, in the past it was not possible to bring a representative action for damages. Those actions were instead confined to seeking equitable relief. The recent trend has been for the courts to relax this rigid approach, with the effect that the losing party to a representative proceeding is estopped from challenging the common elements for establishing liability (or lack thereof) in subsequent proceedings. The winning side need only establish the remaining elements (if any) in subsequent proceedings. The quantum for each class member, except the representative party, will also be determined in the subsequent separate proceedings. While that may save time in the overall process, the substantive hearing itself is likely to take as long as other litigation and perhaps even longer if there are disputes about the definition of the class or identity of the representative parties.

Damages and costs

In civil claims, the damages to be awarded will be determined by the presiding judge (except in defamation cases that are tried by jury, where the jury also determines the level of damages). Ordinary principles for assessment of damages will apply with the aim of compensating the plaintiff for loss suffered or putting him or her back in the same position he or she would have been in had the defendant not committed the wrong. In special cases, for example where the defendant's profits exceed the loss suffered or where there is a strong need for deterrence, the court may disgorge the defendant's profits or impose punitive damages.

Hong Kong still maintains the common law offences of champerty and maintenance. This position has been reaffirmed by the highest court in Hong Kong, the Court of Final Appeal.35 Therefore, success fee arrangements for recovery of costs, such as conditional or contingency fees, are not permitted except under three limited exceptions: (1) a person may have a legitimate common interest in the outcome of the litigation to sufficiently justify supporting the litigation; (2) it is in the interests of promoting access to justice to fund a plaintiff who would otherwise be unable to pursue litigation owing to a lack of funds; and (3) funding is provided to a liquidator to pursue litigation that may improve the return to creditors.36 Hence, litigants funded by the Ordinary Legal Aid Scheme or the Supplementary Legal Aid Scheme, aimed at ensuring those without the means still have access to justice, are required to make a contribution out of their recovered proceeds back into the scheme fund.

The LRC Report has recommended that a general class actions fund, similar to the Supplementary Legal Aid Scheme fund, be set up to provide financial support to means-tested eligible class action plaintiffs, who must in turn contribute part of their recovered proceeds back into the fund.


The representative plaintiff is the individual who has a real interest in the outcome of the case and, prior to the court rendering judgment, may choose to settle and discontinue his or her action. In such an event, the rights of the represented members are not extinguished and they may commence proceedings in their own name. The court can also add or substitute an unnamed member of the class as the plaintiff of the action, who will be treated as having been brought in at the date of the original writ.


Despite attempts to make representative proceedings more flexible, there are very few instances of the mechanism being used in practice. In principle, an overseas plaintiff should not be treated differently from a local plaintiff falling within the same member class in a representative proceeding. However, the usual practice in respect of overseas plaintiffs is for them to pursue their case separately in their own name as opposed to relying on a representative plaintiff. It is also the usual practice for overseas plaintiffs to separately name and join each defendant to an action unless it is in their strategic interest, because of the large number of defendants, to apply to court for a representative defendant to be appointed.


Hong Kong's representative proceedings system remains an under-utilised mechanism for plaintiffs pursuing class action-type claims. As the Chief Justice's Working Party on Civil Justice Reform Interim Report and Consultative Paper notes, there are still many 'self-evident' limitations under the existing system. First, the current system is still comparatively restrictive when it comes to defining same interest. Second, even if a judgment is rendered in a representative proceeding, there is still a lack of finality given that class members who are, in principle, bound by the decision can still plead that the facts and matters of their own case mean they should fall outside the represented class. Finally, the existing provisions may not be able to cope with the special problems that arise in the context of a multiparty litigation.37

Likewise, the LRC Report observes that very few Hong Kong cases have made use of representative proceedings. The LRC attributes this to the fact that despite initiatives to reform the system, judicial actions have been piecemeal at best and there still exist many hurdles to overcome in bringing about a representative proceeding, which dissuades plaintiffs from choosing this route.

The LRC's recommendations represent a positive step forward in the effort to reform the current class action regime in Hong Kong. However, the pace of reform is far from quick and Hong Kong is still some way off from benefiting from a class actions regime that adequately addresses the needs of large-scale, cross-border multiparty litigation. The Hong Kong government appears hesitant to chart the waters of class action regimes as it currently takes the view that the existing system provides adequate channels for claimants to seek judicial remedies, and encourages potential litigants to use channels other than litigation, such as mediation, to resolve disputes.38 It is hoped that the working group and subcommittee will be able to finalise and publish the consultation document in the near future and the DOJ will map out the process of drafting legislation to reform and update Hong Kong's class action regime.


1 Kevin Warburton is a counsel at Slaughter and May.

22 The multiparty proceedings approach has since been superseded in England by Section III of Part 19 of the Civil Procedure Rules.

3 Order 15, Rule 12(1), Rules of the High Court (Cap. 4A).

4 Order 15, Rule 12(2), Rules of the High Court (Cap. 4A).

5 Order 15, Rule 12, Rules of the District Court (Cap. 336H).

6 Section 21, Small Claims Tribunal Ordinance (Cap. 338). The Small Claims Tribunal does not permit legal representation in hearings before it.

7 Order 15, Rule 12(3), Rules of High Court (Cap. 4A).

10 Dennis Kwok, 'Lead-in-water crisis highlights the need for class-action suits', Hong Kong Economic Journal (25 July 2015), available at: www.ejinsight.com/20150725-lead-water-crisis-highlights-need-class-action-suits/.

11 David Webb, 'Why HK should back competition law and class actions', International Financial Law Review (28 February 2012) available at: www.iflr.com/Article/2986290/David-Webb-Why-HK-should-back-competition-law-and-class.html.

12 CBS/Sony Hong Kong Ltd v. Television Broadcasts Ltd [1987] HKLR 306.

13 Markt & Co. Ltd. v. Knight Steamship Co. Ltd [1910] 2 KB 1021 (CA) at 1040–1045.

14 ibid., at 1039–1040.

1515 Prudential Assurance Co Ltd v. Newman Industries Ltd [1981] Ch 229, at 244, 255.

16 John v. Rees and Others [1970] Ch 345.

17 Prudential Assurance Co Ltd v. Newman Industries Ltd [1981] Ch 229, at 252, 255.

18 ibid., at 255.

19 Irish Shipping Ltd v. Commercial Union Assurance Co plc (The Irish Rowan) [1991] 2 QB 206 (CA).

20 Ng Hing Yau v. City Noble Developments Ltd [2017] HKEC 2470, at 12.

21 Independiente Ltd v. Music Trading On-Line (HK) Ltd [2003] EWHC 470 (Ch).

22 Moon v. Atherton [1972] 2 Q.B. 435, CA.

23 London Association for Protection of Trade v. Greenlands Ltd [1916] 2 A.C. 15.

24 Sung Sheung-hong v. Leung Wong Soo-ching [1965] HKLR 602.

25 Re Pentecostal Mission, Hong Kong and Kowloon [1962] HKLR 171.

26 Hong Kong Kam Lan Koon Ltd v. Realray Investments Ltd (No. 2) [2005] 1 HKC 565.

27 Malayan Banking Berhad v. China Insurance Co Ltd. [2003] HKEC 708.

28 Re Braybrook [1916] WN 74.

29 Re Pentecostal Mission, Hong Kong and Kowloon [1962] HKLR 171.

30 Order 6, Rule 3(b), Rules of the High Court (Cap. 4A).

31 Walker v. Sur [1914] 2 KB 930.

32 Baynard Ltd v. Secretary for Justice [2011] 1 HKLRD C3 English Judgment.

33 Order 15, Rule 12(3), Rules of the High Court (Cap. 4A).

34 Order 15, Rule 12(4), Rules of the High Court (Cap. 4A).

35 Unruh v. Seeberger [2007] 2 HKLRD 414.

36 ibid. See also Re Cyberworks Audio Video Technology Limited [2010] 2 HKLRD 1137.

37 Chief Justice's Working Party on Civil Justice Reform, Civil Justice Reform Interim Report and Consultative Paper (2001) at pp. 148–149.