Practical Benefit for Service Out to Enforce Foreign Judgments: Contingent Aircraft‑Leasing Receivables as Irish Assets

1) Introduction

In FW Aviation (Holdings) 1 Limited v VietJet Joint Stock Aviation Company [2026] IEHC 459, the High Court (Commercial List) considered whether an ex parte order permitting service out of the jurisdiction should be discharged in proceedings seeking recognition and enforcement in Ireland of final English judgments.

The plaintiff (an aircraft owner/lessor group entity) had obtained English High Court judgments against the defendant airline (domiciled in Vietnam) in an amount exceeding US$181m. The defendant applied to discharge the Order 11 “service out” permission on the basis that the plaintiff could not show it was likely to obtain a practical benefit from the Irish proceedings.

The asserted Irish “assets” were primarily: (i) contractual entitlements to reimbursement from maintenance reserves held by aircraft lessors (many allegedly Irish-domiciled), (ii) contractual entitlements to return of lease deposits, and (iii) shareholdings in Irish subsidiaries/SPVs.

A separate, now-moot, motion challenged an order for substituted service; the Court nonetheless had to decide costs of that motion, applying Irish authority on mootness.

2) Summary of the Judgment

• Jurisdiction challenge dismissed: Mulcahy J held the plaintiff met the (low) threshold of showing it was likely to obtain a practical benefit from Irish recognition/enforcement proceedings because the identified interests (maintenance reserve reimbursements, lease deposit repayment rights, and certain Irish shareholdings) were likely assets in the jurisdiction with a realistic prospect of being amenable to enforcement.
• Maintenance reserves and lease deposits treated as assets: Although the underlying funds are typically the lessor’s property, the lessee’s contractual right to reimbursement/repayment is a chose in action and can constitute an asset for Order 11 practical-benefit purposes.
• Event-of-default arguments rejected on the evidence: The defendant’s contention that recognition/enforcement would trigger lease “events of default” making reimbursement/repayment effectively unavailable was found inadequately supported, internally unlikely, and inconsistent with commercial-contract orthodoxy as advanced.
• Service motion costs awarded to the defendant: Although later Hague Convention service made the service challenge moot, the Court held the plaintiff’s own steps (pursuing two alternative service tracks) foreseeably caused the mootness; applying Hughes v Revenue Commissioners, costs followed that cause.

3) Analysis

3.1 Precedents Cited (and How They Shaped the Decision)

(a) The governing Irish framework: Albaniabeg Ambient Sh.p.k. v Enel Sp.A and Ors [2018] IECA 46

The Court treated Albaniabeg as the leading Irish authority on setting aside an Order 11 service-out order in foreign judgment enforcement proceedings. From Albaniabeg, Mulcahy J adopted the familiar three-part analysis (Hogan J summarising McDermott J):

1. Good arguable case (generally satisfied where a final foreign judgment exists);
2. Likely practical benefit from the Irish proceedings (even indirect/prospective);
3. Comparative cost and convenience under Order 11, r.2.

The parties agreed only limb (2) was in dispute. The judgment’s central contribution is its fact-specific application of “practical benefit” to modern aircraft-leasing receivables and deposit-return rights.

The case was distinguished from Albaniabeg because, unlike there, the plaintiff here did not merely posit speculative future assets; it pointed to specific asset categories and relied on the defendant’s own audited accounts classifying those interests as receivables.

(b) “Solid practical benefit” and indirect/prospective benefit: Fonu v Demirel [2007] 1 WLR 2508 and Insurance Corporation of Ireland v Strombus International Insurance Co [1985] 2 Lloyd's Rep 138

The Court used these authorities (via Albaniabeg and Irish case law) to confirm that a benefit need not be immediate or direct: an indirect or prospective benefit may suffice. Mulcahy J treated variations in language (“real/solid/some”) as not signalling different legal tests, but a common requirement of a realistic evidential basis.

(c) Irish recognition proceedings even without assets (exceptionally): Yukos Capital SARL v OAO Tomskneft VNK [2014] IEHC 115

Yukos was cited for two points: (i) it is reasonable to ask what the prospect of recovery against Irish assets might be; and (ii) in some cases recognition may be sought for the “imprimatur” of a respected court. Mulcahy J noted that while recognition alone can be a benefit in some cases, the plaintiff did not advance that as a standalone basis here; the case turned instead on the existence and amenability of assets.

(d) “Low bar” but still evidence-based: IBRC v Quinn [2016] 3 IR 197

The Court echoed Hogan J’s observation in Albaniabeg (referencing IBRC v Quinn) that the bar is low, but not non-existent: a judgment creditor must still show it stands to obtain some practical benefit. Mulcahy J’s approach illustrates what can satisfy that low bar: audited accounts, industry structure, and a plausible enforcement pathway.

(e) Practical benefit revisited: Petersen Energia Inversora SAU v Argentine Republic [2025] IEHC 463

Petersen was treated as consistent with Albaniabeg and distinguishable on the facts: in Petersen (as characterised by Mulcahy J) no assets were shown to exist within the jurisdiction and no realistic prospect of future assets was established.

(f) Enforcement tools against contingent/intangible interests: ACC v Rickard [2019] 3 IR 557, [2019] IESC 29

The plaintiff relied on ACC v Rickard to argue that contingent or future entitlements (such as reimbursement rights) can be targeted via a receiver by way of equitable execution, and that receivership can support a share charging order (Order 46). Mulcahy J did not finally determine enforcement efficacy; however, he accepted that the mechanisms exist “in principle” and treated the issue as whether the asset categories were real and plausibly amenable to enforcement.

(g) Costs on moot proceedings: Hughes v Revenue Commissioners [2023] 3 IR 393, [2021] IECA 5; and Slabu v Chief Appeals Officer [2026] IEHC 292

For costs of the moot service motion, the Court applied the Hughes framework, focusing on the event causing mootness and whether it was outside control, or caused unilaterally by one party (and if so, whether in response to the proceedings).

Slabu was noted (without deciding its full implications) as a scenario where a case is not truly “moot” for costs because a later authoritative decision effectively determines the outcome. Mulcahy J ultimately resolved costs by characterising mootness as caused by the plaintiff’s service choices and by applying Hughes rather than litigating merits of substituted service.

3.2 Legal Reasoning

(1) What “practical benefit” required in this case

Mulcahy J accepted that the plaintiff did not have to prove successful enforcement at the jurisdiction stage. However, the Court clarified an important nuance: it is not enough merely to point to “assets”; there must be a realistic prospect those assets could be subjected to some enforcement mechanism if recognition is granted. The threshold remains “low”, akin to an arguable case, but it is still evidence-driven.

(2) Maintenance reserves: the right (not the fund) as the asset

The Court drew a sharp distinction between (i) maintenance reserve monies held by lessors (not the airline’s property) and (ii) the airline’s contractual entitlement to reimbursement when qualifying maintenance is performed and paid for—an intangible right treated as a receivable in audited accounts.

Two evidential pillars mattered:

• The defendant’s audited accounts treated maintenance reserves as short/long-term receivables and explained recognition of those contributions as receivables when it is “certain” they will be utilised for periodic maintenance under leases.
• The plaintiff’s evidence (public aircraft/lessor data) suggesting a substantial proportion of lessors were Irish-domiciled, supporting the inference that relevant contractual counterparties—and thus enforceable debts/rights—would be connected to Ireland.

The Court was notably unwilling to allow the defendant to distance itself from the implications of its own published audited accounts without “something compelling”.

(3) Lease deposits: prospective but still a “likely” practical benefit

The lease deposit claim was the “most straightforward” basis for practical benefit. Even if deposits would not be repayable until the end of the lease (earliest 2029 on the evidence), the Court held that Irish law does not require assets to be imminently available—only that they are likely to exist and offer a real enforcement prospect. A future enforcement opportunity can still ground service out now.

Attempts to defeat this by suggesting a general “event of default” would make repayment discretionary were rejected as opaque and unsupported, particularly where the defendant did not produce the relevant lease terms.

(4) “Event of default” and industry-practice evidence: admissibility vs weight

The defendant relied heavily on an aviation industry adviser’s assertions about “typical” lease clauses and alleged commercial reality: recognition/enforcement would constitute an “event of default” leading lessors to withhold reimbursements/repayments or pay contractors directly, making enforcement pointless.

Mulcahy J treated this evidence carefully:

• The Court accepted it was, in substance, akin to expert evidence, but the witness was not put forward as an independent expert and had a close connection to the defendant.
• Rather than excluding the evidence outright, the Court treated it as “industry experience” evidence from a factual witness—thus admissible but not determinative.
• Crucially, the Court found the leap from “typical event of default clause” to “lessors can refuse to perform repayment/reimbursement obligations while keeping the lease alive” to be unsupported and commercially counter-intuitive as advanced.

The Court also rejected the defendant’s attempt to place the onus on the plaintiff to obtain and deploy the actual leases from English disclosure (particularly given confidentiality constraints and late timing), noting the defendant’s own choice not to exhibit lease terms while criticising the plaintiff for not doing so.

(5) Irish subsidiaries: asset existence accepted; “nothing there” not proven at this stage

Shareholdings in Irish subsidiaries/SPVs were prima facie assets. The defendant asserted that rental streams bypassed Irish entities due to the sub-lease structure. The Court considered this insufficiently evidenced, especially where filed accounts (though out of date) appeared to treat rental income as flowing through the Irish company structure. This was enough, at the jurisdiction stage, to preserve a realistic enforcement prospect.

(6) Service motion costs: foreseeability and causation of mootness

On costs of the moot substituted service motion, Mulcahy J applied Hughes v Revenue Commissioners and characterised the key event causing mootness as the Article 6 Hague certificate confirming service via the Vietnamese Central Authority. Although the Central Authority’s actions were not controlled by either party, the Court treated mootness as ultimately caused by the plaintiff’s unilateral act of initiating the Hague process (and, more pointedly, its decision to pursue substituted service while also pursuing Hague service).

The Court emphasised foreseeability: the plaintiff should have contemplated that success in Hague service would render substituted service superfluous and thus make the challenge moot. Costs therefore followed the party whose steps caused mootness; the defendant recovered costs of the service motion (with a stay on execution).

3.3 Impact

(a) Enforcement jurisdiction: aircraft leasing receivables can anchor Irish proceedings

The decision provides a practical roadmap for judgment creditors seeking to use Ireland as an enforcement venue where the debtor participates in Irish-centred aircraft leasing structures. It confirms that:

• Choses in action arising from aircraft leases (reimbursement rights, deposit-return rights) can be treated as assets for Order 11 practical-benefit purposes.
• The “practical benefit” requirement is not satisfied by mere assertion; but audited accounts and plausible contractual counterparties in Ireland can satisfy the low threshold.
• Defendants resisting service out should expect courts to demand concrete evidential support where they contend that identified assets are inherently unenforceable (especially if the defendant itself can readily produce the operative contracts but does not).

(b) Timing: future availability of assets (e.g., 2029 deposit maturities) may still justify proceedings now

The Court’s acceptance that benefits may be prospective reinforces Ireland’s utility where assets are likely to mature over time. That may influence how creditors plan multi-jurisdiction enforcement strategies, including early recognition to position for later enforcement steps.

(c) Mootness costs: parties initiating parallel procedural tracks may bear cost risk

On litigation conduct, the costs ruling signals that a party who sets in motion events that foreseeably make an opponent’s application moot may carry the costs burden—even where the mootness is effected through a third-party authority (here, a Hague Central Authority). This may influence tactical decisions about running substituted service in parallel with Hague service.

4) Complex Concepts Simplified

Service out of the jurisdiction (Order 11)

Permission required to serve Irish proceedings on a defendant abroad. In foreign-judgment enforcement cases, the plaintiff must generally show a good arguable case, likely practical benefit, and comparative cost/convenience.

“Practical benefit”

A realistic benefit the plaintiff is likely to obtain from Irish proceedings (not necessarily immediate or direct). It commonly means some real prospect of recovery from Irish-linked assets.

Chose in action / receivable

An enforceable contractual right to payment (an intangible asset), even if payment is conditional or in the future.

Maintenance reserves

Amounts paid under aircraft leases toward future maintenance. The funds are usually the lessor’s property, but the lessee may have a contractual right to reimbursement for qualifying maintenance costs—treated here as an asset.

Lease deposits

Deposits paid at lease inception, typically refundable at lease end if obligations are met. The right to repayment can be an asset even if repayable years later.

Receiver by way of equitable execution

A court-appointed receiver who can collect or realise certain assets/rights to satisfy a judgment, useful for intangible or future entitlements.

Garnishee order (Order 45) and share charging order (Order 46)

Mechanisms to attach debts owed to the judgment debtor (garnishee) or to charge and realise shares (Order 46).

Hague Service Convention / Article 6 certificate

A treaty-based method of service abroad via Central Authorities. An Article 6 certificate is formal proof that service has been effected.

Mootness and costs

If an application becomes pointless because events overtake it, Irish courts often decide costs by examining what caused the mootness (per Hughes v Revenue Commissioners), not by deciding who would have won on the merits.

5) Conclusion

[2026] IEHC 459 reinforces that, in foreign judgment enforcement proceedings, the “practical benefit” limb of the Order 11 test can be satisfied by identifying Irish-linked intangible assets such as contractual reimbursement rights and deposit-return rights arising in aircraft leasing. Mulcahy J’s analysis shows that courts will treat audited financial statements and realistic commercial structures as meaningful evidence of assets and will not accept speculative “commercial reality” objections (such as unproven event-of-default consequences) as sufficient to defeat jurisdiction at a preliminary stage.

The decision also provides a cautionary costs lesson: where a party pursues parallel procedural routes and its own choices foreseeably render an opponent’s application moot, costs may follow the party that caused the mootness, even if the immediate triggering act is performed by a third-party authority.