Factual and Procedural Background
This Supreme Court judgment concerns an appeal arising from family law litigation in which the Court of Appeal made a litigation restraint order (commonly referred to as an “Isaac Wunder order”) against the Appellant. The order restrained the Appellant from instituting any proceedings against the Respondent (including any appeal) in any court other than the Supreme Court, without prior leave of the President of the relevant court (or nominee), for an indefinite period.
The Supreme Court considered the central question of whether such orders may be made in family law proceedings and addressed related jurisdictional questions concerning the scope of the Superior Courts’ powers and the powers of the Circuit and District Courts. The Supreme Court dismissed the appeal and affirmed the Court of Appeal’s order.
Legal Issues Presented
- Whether “Isaac Wunder” litigation restraint orders may be made in family law proceedings, and if so, in what circumstances and subject to what conditions.
- Whether such orders impermissibly interfere with the constitutional right of access to the courts, and whether they are contrary in principle to Articles 6 and/or 8 of the ECHR.
- Whether the High Court (and, on appeal, the Court of Appeal and Supreme Court) may make orders regulating the commencement and/or maintenance of proceedings in the Circuit and District Courts.
- On what basis, and to what territorial extent, the Circuit and District Courts have power to make “Isaac Wunder” type orders in respect of proceedings before them.
Arguments of the Parties
The opinion does not contain a detailed account of the parties' legal arguments.
Table of Precedents Cited
| Precedent |
Rule or Principle Cited For |
Application by the Court |
| Brandley v Deane [2017] IESC 83, [2018] 2 IR 741 |
Access to the courts as a fundamental constitutional right. |
Used to acknowledge the primacy of court access while framing the analysis of proportionate restrictions on abusive litigation. |
| Riordan v Ireland (No 4) [2001] 3 IR 365 |
No entitlement to use court process to reopen litigation or pursue plainly groundless/vexatious claims. |
Relied on to support the legitimacy of restraining abusive proceedings. |
| Fitzsimons v Bank of Scotland Plc [2019] IECA 336 |
An “Isaac Wunder” order as a proportionate “filtering mechanism” protecting opponents from oppressive and abusive claims and costs. |
Applied to characterise the restraint as permission-based (not an absolute bar) and therefore proportionate. |
| Houston v Doyle [2020] IECA 289 |
Public-interest foundations of the jurisdiction (finality, proper use of resources) and ability to act of the court’s own motion. |
Used to explain that the jurisdiction protects not only parties but also the administration of justice. |
| Kirwan v Connors [2025] IESC 21 |
Discussion of inherent powers of courts; inherent/implied powers may be regulated by rules. |
Used to ground the “Isaac Wunder” power as an inherent power and to support regulation by court rules rather than requiring legislation. |
| Bhamjee v Forsdick (Practice Note) [2003] EWCA Civ 1113, [2004] 1 WLR 88 |
Necessity of restraint powers to maintain courts as courts of justice; recognition and structuring of civil restraint orders (including duration guidance). |
Used to support the conceptual basis of inherent restraint powers and to compare the breadth/duration of the order made with UK “General Civil Restraint Orders.” |
| Cocker v Tempest (1841) 7 M & W 502 |
Historical trace of recognition of restraint-type powers. |
Referenced as part of the lineage of the inherent jurisdiction identified in Bhamjee v Forsdick. |
| Wunder v Hospitals Trust (1940) Ltd (Unreported, 11 April 1967) |
Early Irish instance of an order later labelled an “Isaac Wunder order.” |
Used to note the jurisdiction’s history in Ireland and that there is no single standard form of order. |
| Grepe v Loam (1887) 37 Ch D 168 |
Referenced (in a footnote) as a case cited by Irish courts on restraint orders in more recent times. |
Noted to contextualise that such references post-date Wunder. |
| O' Malley v Irish Nationwide Building Society (Unreported, High Court, Costello J, 21 January 1994) |
Observation that such orders were previously made only “in very rare circumstances.” |
Used to contrast past rarity with increasing modern frequency of applications/orders. |
| Ebert v Venvil [2000] Ch 484 |
High Court supervisory jurisdiction can be exercised by injunction/restraint orders, not only judicial review. |
Relied on to support the proposition that the High Court (and appellate courts) may regulate proceedings in lower courts through restraining orders enforceable against the litigant. |
| In re Connolly Brothers Ltd. [1911] 1 Ch. 731 |
Authority supporting supervisory restraint of proceedings in another court. |
Cited within the quotation from Ebert v Venvil as supporting authority. |
| R v Davies [1906] 1 KB 32 |
High Court power to punish contempt before/of lower courts. |
Used illustratively to show the breadth of the High Court’s supervisory jurisdiction. |
| AG v O' Ryan and Boyd [1946] IR 70 |
High Court power concerning contempt connected to lower courts. |
Used alongside other authorities to illustrate supervisory powers beyond judicial review. |
| AG v Connolly [1947] IR 213 |
High Court power concerning contempt connected to lower courts. |
Used alongside other authorities to illustrate supervisory powers beyond judicial review. |
| State (DPP) v Walsh & Conneely [1981] IR 412 |
High Court power concerning contempt connected to lower courts. |
Used alongside other authorities to illustrate supervisory powers beyond judicial review. |
| Clune v Director of Public Prosecutions [1981] ILRM 17 |
Discussion of High Court power to grant injunction/prohibition directed to the District Court; evidential insufficiency on a quia timet basis. |
Used to reject a literal reading suggesting lower courts are free from superior court control; emphasised as consistent with supervisory jurisdiction. |
| SP v UG [2016] IEHC 693 |
Rationale for implied power of lower courts to supervise and control their own processes. |
Approved (as referenced) to support locating the Circuit/District Courts’ restraint power in implied/inherent control of their own procedures. |
| State (Boyle) v Neylon [1986] IR 551 |
Although there is “only one” Circuit Court/District Court, their structure differs; transfer mechanisms may require express legislative provision. |
Used to emphasise that organisational structure matters when assessing the territorial reach of implied powers. |
| Permanent TSB v Langan [2017] IESC 71, [2018] 1 IR 375 |
Article 34.3.4° requires real meaning to the “limited” jurisdiction of the Circuit Court; it cannot become a surrogate court of full original jurisdiction. |
Used to frame constitutional sensitivity and potential limits if nationwide restraint powers for lower courts were to be conferred by law. |
Court's Reasoning and Analysis
Judge Collins agreed that the appeal should be dismissed and largely agreed with the detailed analysis and conclusions of Judge Dunne. On the central issue, he held that the “Isaac Wunder” jurisdiction is not excluded in family law; rather, the best interests of the child may justify such an order, particularly where proceedings are misused to oppress, harass, or destabilise the other party.
On the right of access to the courts, the judgment acknowledged it as a fundamental constitutional right, but emphasised that there is no right to use court process to reopen litigation or to pursue plainly groundless and vexatious claims. An “Isaac Wunder” order was treated as not denying access outright, but requiring prior permission—described in authority as a proportionate filtering mechanism.
The judgment also identified burdens beyond costs, including psychological toll and systemic strain on the administration of justice. It treated the public interest in finality and the proper use of limited court resources as a core feature of the jurisdiction, including explaining why such orders may be made of the court’s own motion.
Judge Collins agreed that the existence and/or exercise of the jurisdiction in family law is not, in principle, contrary to Articles 6 and/or 8 ECHR. He characterised the power as part of courts’ inherent powers necessary to maintain their character as courts of justice, and traced historical recognition of such powers.
Turning to the specific order under appeal, the judgment noted its breadth: it restrained the Appellant from instituting any proceedings against the Respondent in any court (other than the Supreme Court) without leave, for an indefinite period. The judgment compared this to a “General Civil Restraint Order” in England and Wales and highlighted that UK practice typically imposes maximum durations (subject to extension), supported by procedural rules that structure applications and permissions.
The judgment expressed concern that, in Ireland, there is no legislative intervention or rules regulating the exercise of the jurisdiction, and suggested it is “high time” that rules are made to structure procedures, thresholds, duration, terminology, recording/public access (including potential data protection issues), permission applications, and appeal rights. It further stated that, because the power is inherent/implied, it can be regulated by rules made by the Superior Courts Rules Committee, even if legislation might be valuable in some respects.
On supervisory jurisdiction, Judge Collins agreed that the High Court (and, on appeal, the Court of Appeal and Supreme Court) may make orders regulating the commencement and/or maintenance of proceedings in the Circuit and District Courts. He grounded this in the broader supervisory jurisdiction (typically exercised via judicial review but not limited to it) and referenced authorities illustrating contempt powers and injunctive relief restraining proceedings in lower courts.
Judge Collins then diverged from colleagues on the second issue: the basis and reach of the Circuit and District Courts’ own power to make “Isaac Wunder” type orders. He would locate such power exclusively in their implied power to supervise and control their own processes, not in specified provisions of the Courts (Supplemental Provisions) Act 1961. He considered it implausible that the legislature intended to confer such a power statutorily before it was established that the Superior Courts possessed it, and he noted that a statutory foundation might also imply the District Court lacked any equivalent power.
Having regard to constitutional and structural features—particularly the local basis of Circuit and District Court jurisdiction—he concluded that justice is adequately met by recognising a power in those courts to make such orders only in relation to their respective Circuits and Districts. He reasoned that any broader (“nationwide”) power would likely require conferral by law and careful consideration of constitutional constraints, with Permanent TSB v Langan informing (but not concluding) that debate.
Holding and Implications
APPEAL DISMISSED. The Supreme Court affirmed the Court of Appeal’s order imposing a broad litigation restraint requirement on the Appellant (permission required before instituting proceedings against the Respondent in any court other than the Supreme Court).
The direct effect is that the restraint order remains in force as made by the Court of Appeal, requiring prior leave for further proceedings captured by its terms. The judgment also underscored that such orders can be justified in family law (including by reference to child welfare and protection against abusive litigation) and recommended that procedural rules be developed to regulate the making, duration, recording, and operation of these orders; it did not state that it was setting new precedent beyond affirming the jurisdiction and endorsing regulatory reform.