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State Immunity

The principle that a sovereign state and its property are immune from the jurisdiction of foreign national courts without consent.

Updated April 23, 2026


How It Works

State immunity means that a country’s courts generally cannot hear cases against foreign governments unless those governments agree to it. This principle is rooted in the idea that all sovereign states are equal and independent, so one state should not be judged or interfered with by another’s courts without consent. For example, if a person tries to sue a foreign government in their home country’s courts, the case will usually be dismissed because of state immunity.

Why It Matters

State immunity protects countries from legal actions that could interfere with their sovereignty and diplomatic relations. Without it, states might face endless lawsuits abroad, which could disrupt international relations and complicate diplomacy. It also helps maintain stability by respecting each state's authority and preventing one state’s courts from imposing their laws on another state’s actions.

State Immunity vs Diplomatic Immunity

While both protect states and their representatives, state immunity applies to the state itself and its property, protecting it from being sued in foreign courts. Diplomatic immunity, on the other hand, protects individual diplomats from legal action in the host country to ensure they can perform their duties without harassment. State immunity is broader, covering the entire sovereign entity, while diplomatic immunity is personal and limited to diplomats.

Exceptions to State Immunity

State immunity is not absolute. Many countries recognize exceptions, especially when a foreign state engages in commercial activities (known as the "commercial activity exception") or commits acts causing harm outside its sovereign functions. For example, if a state runs a business in another country, it might be sued in that country’s courts over commercial disputes. Also, some international crimes or violations of human rights may not be protected by state immunity.

Real-World Examples

A famous case involving state immunity was the lawsuit against Iran in the United States by victims of a terrorist attack allegedly sponsored by the Iranian government. While the U.S. courts initially recognized state immunity, exceptions were made due to the nature of the acts and the commercial activities involved, allowing the victims to seek compensation.

Common Misconceptions

One common misconception is that state immunity means a state can never be held accountable for wrongful acts. In reality, immunity protects against lawsuits in foreign courts but does not grant impunity; states can be held accountable through international courts or diplomatic means. Another misunderstanding is that immunity applies to all actions, but it typically does not cover commercial or private acts unrelated to sovereign functions.

Example

In the 1980s, victims of a terrorist attack in the U.S. sued Iran, challenging state immunity due to Iran's alleged support of terrorism.

Frequently Asked Questions