Yes, countries can sue each other, but not in any ordinary national courtroom. Because every country is treated as a legal equal, no one nation’s judges have automatic authority over another. Disputes between states go to specialized international tribunals that both sides have agreed to use. The main one is the International Court of Justice in The Hague; trade fights, maritime disagreements, and arbitration cases have their own separate forums.
Why National Courts Usually Can’t Hear These Cases
The starting point is sovereign immunity: a country cannot be pulled into another country’s courts without its consent. The logic is straightforward. If France could be sued in a German courtroom, German judges would sit in judgment over the French government, and the two states would no longer be legal equals. The U.S. Supreme Court has called sovereign immunity “a fundamental rule of jurisprudence.”1Constitution Annotated. Amdt11.5.1 General Scope of State Sovereign Immunity
That’s why country-versus-country lawsuits play out in international forums instead.
The Main Court: the International Court of Justice
The International Court of Justice, often called the World Court, was set up alongside the United Nations in 1945 and sits in the Peace Palace in The Hague.2International Court of Justice. The Court Only states can be parties in ICJ contentious cases. Individuals, companies, and NGOs cannot file suit there, and they cannot be sued there.3United Nations. Statute of the International Court of Justice
ICJ judgments are legally binding on the states involved, but they don’t create binding precedent the way U.S. Supreme Court decisions do. A ruling settles the dispute in front of the Court and nothing more, though the reasoning carries heavy persuasive weight in how international law develops.4United Nations. Statute of the International Court of Justice (PDF)
How One Country Ends Up Bound to Answer Another
No country can be forced before the ICJ against its will. Jurisdiction depends on consent, and consent comes in three forms.
The first is a special agreement. Two countries with an existing dispute jointly hand the question to the Court and ask it to decide.5International Court of Justice. Statute of the International Court of Justice
The second is a jurisdictional clause inside a treaty. Many international treaties say that any dispute over the treaty’s meaning or application can be brought to the ICJ. South Africa used this route in its 2023 case against Israel, filed under the Genocide Convention’s dispute clause.6International Court of Justice. Order of 26 January 2024
The third is an optional clause declaration under Article 36(2) of the ICJ Statute. A state files a standing declaration accepting the Court’s jurisdiction as compulsory against any other state that has filed a similar declaration.7International Court of Justice. Declarations Recognizing the Jurisdiction of the Court as Compulsory Currently, 75 states have such declarations in force. Most UN member states don’t. The United States withdrew its declaration in 1985 after the ICJ took up Nicaragua’s case against it, and China, Russia, and France have either withdrawn or never filed one. The world’s major powers largely reserve the option to decline.
What if a country that has consented then refuses to show up? The ICJ Statute allows the other side to ask the Court to rule anyway, but the Court still has to independently verify both jurisdiction and the merits before entering judgment.5International Court of Justice. Statute of the International Court of Justice The absent state loses its chance to argue; it doesn’t get an automatic loss on the papers.
What Countries Actually Sue Each Other About
The ICJ’s docket covers a wide range of disagreements:
- Territorial and maritime boundaries, such as Romania v. Ukraine over Black Sea limits and Nicaragua v. Colombia over maritime territory.8International Court of Justice. Contentious Cases
- Treaty violations, where one country accuses another of breaking obligations under an international agreement, from trade deals to human rights conventions.
- Claims for reparations after one state’s unlawful conduct causes harm to another.
- Diplomatic disputes, including the treatment of diplomats and the immunity of embassy premises.
Emergency Orders While a Case Is Pending
Some international disputes can’t wait years for a final ruling. The ICJ can issue provisional measures ordering a state to do or stop doing something while the case proceeds. Since the Court’s 2001 decision in Germany v. United States (the LaGrand case), those orders have been treated as legally binding rather than as suggestions.9International Court of Justice. LaGrand – Germany v. United States of America
In January 2024, for example, the Court ordered Israel to take all measures within its power to prevent acts falling within the Genocide Convention and to ensure humanitarian assistance reaches Gaza.6International Court of Justice. Order of 26 January 2024 Whether states actually comply is a separate question.
What Happens If the Losing Side Ignores the Ruling
Every UN member state has agreed, by signing the UN Charter, to comply with any ICJ decision in a case to which it is a party.10International Court of Justice. Frequently Asked Questions Most of the time, states do comply. When they don’t, the Charter offers one route: the winning side can bring the matter to the UN Security Council, which can recommend or decide on measures to enforce the judgment.11United Nations. UN Charter Chapter XIV – The International Court of Justice
The catch is well known. Any substantive Security Council action requires the concurring votes of all five permanent members: the United States, the United Kingdom, France, Russia, and China. Any one of them can veto an enforcement resolution.12United Nations. Chapter V – The Security Council, Articles 23-32
The clearest example: in 1986, the ICJ ruled that the United States had violated international law through its military and paramilitary activities against Nicaragua. When Nicaragua asked the Security Council to enforce the judgment, the United States vetoed the resolution twice.13United Nations. Article 94 Repertory Supplement The judgment was never enforced. That gap between legal authority and practical power is a large part of why the United States pulled out of compulsory jurisdiction.
Not Every Dispute Goes to the ICJ
Depending on the subject, a country may end up in a different tribunal.
WTO Dispute Settlement
Trade disputes between WTO members go through the WTO’s Dispute Settlement Body. Consultations come first; if those fail, an expert panel hears the case and issues a report. As of late 2024, WTO members had filed 631 consultation requests over the system’s history.14World Trade Organization. Dispute Settlement The system is currently stuck. The WTO’s Appellate Body, which hears appeals of panel rulings, has had zero members since November 2020 and cannot function, so a losing party can appeal into the void and block a final decision.15World Trade Organization. Appellate Body
The International Tribunal for the Law of the Sea
Maritime disputes have a dedicated forum in ITLOS, set up under the UN Convention on the Law of the Sea. It handles fishing rights, deep-sea mining, and the release of detained vessels and crews, among other issues. In some situations its jurisdiction is mandatory, meaning states don’t need to give separate consent.16International Tribunal for the Law of the Sea. The Tribunal
The Permanent Court of Arbitration
Despite its name, the PCA is not a standing court with permanent judges. It’s an organization that facilitates arbitration between states, state entities, intergovernmental organizations, and private parties. The parties pick the arbitrators and the procedural rules, which makes it more flexible than the ICJ. Its caseload includes territorial disputes, treaty claims, and investment arbitration.17Permanent Court of Arbitration. About Us
The ICJ Is Not the ICC
These two are often mixed up. The International Court of Justice settles legal disputes between countries: boundaries, treaty breaches, reparations. The International Criminal Court prosecutes individual people for genocide, crimes against humanity, war crimes, and aggression.18Congress.gov. The International Court of Justice and the International Criminal Court A country brings a case at the ICJ. A prosecutor charges a person at the ICC. Different statutes, different judges, different rules, even though both sit in The Hague.
The Narrow Exception: Suing a Foreign Government in U.S. Courts
Sovereign immunity isn’t absolute. Most countries follow the restrictive theory: a foreign government stays immune for its governmental acts, but loses immunity when it acts like a private business. In the United States, the Foreign Sovereign Immunities Act sets out when that line has been crossed and a foreign state can be sued in federal or state court.19Office of the Law Revision Counsel. 28 USC 1602
The most-used exception strips immunity when a foreign state’s commercial activity has a connection to the United States. That covers three situations: the commercial activity takes place in the U.S., an act in the U.S. connects to commercial activity abroad, or an act outside the U.S. tied to foreign commercial activity causes a direct effect here.20Office of the Law Revision Counsel. 28 USC 1605 – General Exceptions to the Jurisdictional Immunity of a Foreign State A breached commercial contract with an American company, or an injury on a foreign state-owned airline flying into New York, can land in U.S. court. A foreign government’s actual policy decisions cannot. Many other countries have parallel statutes drawing the same line. The rule is consistent: when a government enters the marketplace, it plays by marketplace rules.