State Immunity and Commercial Activity: Navigating Jurisdiction, Exceptions and Enforcement Risks

Introduction

State immunity remains a core principle of public international law, but its application to commercial activities has evolved. The distinction between sovereign acts (jure imperii) and commercial acts (jure gestionis) determines whether a State may be sued in domestic courts and whether its assets may be targeted for enforcement. This article provides a practical framework for practitioners handling disputes involving States or state‑owned entities, addressing jurisdictional tests, enforcement risks and protective strategies. Av. Burak Şahin of Şahin Hukuk offers practitioner insights relevant to transactions involving State counterparts and assets located in Türkiye and other jurisdictions.

Doctrinal foundations

Traditionally, absolute immunity protected States from suit in foreign domestic courts. Over recent decades, many jurisdictions adopted a restrictive doctrine that distinguishes between sovereign acts and commercial acts. Under the restrictive approach, States can often be subject to jurisdiction in cases arising from their commercial activities.

The commercial‑activity exception

The commercial‑activity exception typically turns on whether the act in question is of a commercial nature under national law and whether a direct connection exists between the act and the claim. Examples include contracts for supply, loans and sales of goods. The exception does not usually apply to core sovereign functions such as legislative acts or high‑level public policy decisions.

Jurisdictional and procedural considerations for claimants

• Choice of forum: select jurisdictions with clear restrictive immunity doctrine and predictable enforcement regimes.
• Plead commercial character early: plead facts that demonstrate the State acted as a market participant and link those facts to the claim.
• Use arbitration where possible: arbitration clauses may avoid domestic immunity hurdles at the jurisdictional stage, but enforcement of awards against state assets raises separate immunity issues.
• Preservation orders and security: seek interim relief to preserve assets or secure guarantees, recognising differing standards for provisional measures against States.

Enforcement challenges and asset immunity

Even where a claimant obtains a judgment or arbitral award, enforcement against State property may be constrained. The key distinction is between sovereign assets (used for governmental purposes) and assets used for commercial activity. National courts apply different tests to determine whether specific assets are immune from attachment.

Practical asset‑tracing and attachment strategies

1. Identify commercial assets: focus on bank accounts, vessels, aircraft or property used for commercial operations rather than diplomatic or military property.
2. Target third‑party vehicles: state‑owned enterprises and special purpose vehicles that hold assets on a commercial basis may be reachable.
3. Use Mareva and equivalent orders: obtain freezing orders where permitted to prevent dissipation, mindful of the higher threshold when defendants are States.
4. Consider contractual waivers and guarantees: where negotiating with a State, include express waiver of immunity for enforcement and specify assets or payment mechanisms not subject to immunity.

Protective measures for States and state entities

States and state‑owned enterprises should adopt measures to mitigate commercial litigation risk:

• clear separations between sovereign functions and commercial operations;
• use of corporate forms and governance to insulate sovereign assets where lawful and transparent;
• carefully negotiated dispute resolution clauses that balance state interests and predictability, and
• proactive insurance and escrow arrangements to reduce the risk of enforcement actions.

Practical checklist for practitioners

1. Assess whether the claim arises from a commercial or sovereign act under the relevant national law.
2. Map the defendant State’s commercial asset footprint and potential enforcement jurisdictions.
3. Consider arbitration and include express immunity waivers and enforcement clauses where possible.
4. Prepare robust factual pleadings and technical proof of commercial character and causal connection.

Conclusion

State immunity in commercial disputes balances sovereign dignity with access to justice. Practitioners must navigate jurisdictional doctrine, evidence of commercial activity and practical enforcement obstacles. Av. Burak Şahin of Şahin Hukuk advises that early strategic planning—choice of forum, asset mapping and clear contractual drafting—greatly improves prospects for effective remedies while respecting sovereign law and international practice.