International Extradition and the Treaty Requirement
Extradition to a foreign country runs on a treaty rather than on a constitutional duty. A judge decides whether the case may proceed, and the Secretary of State decides whether it will, and neither decision is an ordinary appealable order.

The rule in short
Federal law conditions surrender on the existence of an extradition treaty, with a narrow statutory exception. A request travels through diplomatic channels, a federal prosecutor files a complaint, and a judge or magistrate judge hears evidence of criminality. Certification passes the matter to the Secretary of State, who holds the surrender decision. Commitment beyond two calendar months permits application for discharge.
International extradition shares a name with interstate rendition and almost nothing else. There is no constitutional duty between the United States and a foreign state, no governor, no uniform act. There is a treaty, a diplomatic request, a judicial officer who decides whether the case may proceed, and an executive officer who decides whether it will.
The treaty requirement
Federal law makes the point at the front of the chapter. The provisions relating to the surrender of persons who have committed crimes in foreign countries continue in force only during the existence of a treaty of extradition with that foreign government. Without a treaty there is no authority to surrender, and a request from a country with which no treaty exists is answered as a matter of foreign relations rather than through the courts.
One narrow statutory exception exists. Surrender is permitted without regard to the existence of a treaty where the person is not a citizen, national or permanent resident of the United States and has committed a crime of violence against a national of the United States in a foreign country, on the Attorney General's written certification that the offenses would constitute crimes of violence as defined in federal law and are not of a political nature. The exception is used rarely and it does not create a general power.
Because the treaty supplies the authority, its text controls almost everything that follows: which offenses are extraditable, whether nationals must be surrendered, what documents the requesting state must provide, what deadlines apply to a provisional arrest, and what the requesting state may do with the person afterward. Two extradition cases in the same courthouse can proceed under materially different rules because the treaties differ.
How the request arrives
A formal request travels through diplomatic channels rather than between prosecutors. The requesting state transmits its request and supporting documents to the Department of State, which reviews it for treaty sufficiency. The matter then passes to the Department of Justice, and a federal prosecutor files a complaint under oath in the district where the person is found, charging that the person has committed an offense covered by the treaty.
Documents from abroad are handled by a special authentication rule. The certificate of the principal diplomatic or consular officer of the United States resident in the foreign country is proof that depositions, warrants and other papers offered are authenticated in the manner required. That provision removes what would otherwise be an impossible foundation problem and is one reason the hearing moves quickly.
| Stage | Who acts | Question decided | Review available |
|---|---|---|---|
| Request | Requesting state, through diplomatic channels | Whether the treaty supports a request | None in a United States court |
| Complaint | United States attorney | Whether to initiate the proceeding | Prosecutorial discretion |
| Hearing | Justice, judge or magistrate judge | Whether the evidence of criminality is sufficient under the treaty | Habeas corpus, narrow in scope |
| Certification | The same judicial officer | Whether to certify the case to the Secretary of State | Habeas corpus; no direct appeal |
| Surrender | Secretary of State | Whether the person will actually be delivered | Very limited; treated as an executive function |
Rule 1 excludes the extradition and rendition of a fugitive from the proceedings governed by the Federal Rules of Criminal Procedure. There is no discovery as of right, no rules-based motion practice, and no automatic application of the evidentiary framework counsel is used to. What governs is the extradition statutes, the treaty and the practice courts have built around them, and assuming otherwise produces motions that have no basis to rest on.
What the hearing decides
The statute directs that any justice or judge of the United States, or any authorized magistrate judge, may issue a warrant on the complaint, hear the evidence of criminality, and if the evidence is sufficient to sustain the charge under the provisions of the proper treaty, certify the same, together with a copy of all the testimony taken, to the Secretary of State. The same officer issues a warrant committing the person to the proper jail to remain until surrender is made.
The inquiry is not a trial. The judge asks whether the person is the one sought, whether the offense is covered by the treaty, whether the treaty is in force, whether the requirement that the conduct be criminal in both countries is satisfied, and whether there is competent evidence establishing reasonable ground to believe the person committed the offense. Merits defenses, credibility contests and most exculpatory material are outside the inquiry.
Neither certification nor denial is an appealable order. A person certified for extradition proceeds by petition for a writ of habeas corpus, and the review is confined to jurisdiction, treaty coverage and whether any competent evidence supported the probable cause finding. Where a complaint is denied, the government may refile before a different judicial officer, since denial likewise cannot be appealed.
The executive stage and the clock
Certification does not order anyone surrendered. It transmits the record and establishes that surrender is legally permissible. The Secretary of State may then order the person committed under the statute to be delivered to an authorized agent of the foreign government, to be tried for the offense charged, and that agent may hold the person in custody and take the person to the foreign territory pursuant to the treaty.
The executive stage is where considerations excluded from the hearing are weighed: humanitarian concerns, the likelihood of mistreatment, the person's health, and the diplomatic context. Courts have generally treated the surrender decision as committed to the executive and have declined to review the weighing itself, though litigation about the availability of any review continues.
One statutory deadline constrains the process. Where a person committed for extradition is not delivered and conveyed out of the United States within two calendar months after commitment, a judge may, on application and after reasonable notice to the Secretary of State, order the person discharged, with allowance for the time actually required to convey the prisoner from the jail to the border by the most expeditious route. That provision is the international counterpart to the deadlines that appear elsewhere in this field, and it is the practical answer to indefinite commitment.
The requirement the hearing tests most often is treated in dual criminality. What the requesting state may do with the person after surrender is limited by the rule of specialty, and the arrest that frequently precedes any formal request is governed by provisional arrest. None of this resembles rendition between states, which rests on a constitutional obligation rather than on a negotiated bargain, and importing assumptions from one into the other is the most common source of error in a case that involves both.
Points to carry away
- The extradition provisions operate only while a treaty of extradition with the foreign government is in force.
- A statutory exception permits surrender of a non-citizen for a violent crime against a United States national abroad without a treaty.
- The hearing is held by a justice, judge or magistrate judge, who considers evidence of criminality and may certify the case.
- The Federal Rules of Criminal Procedure do not apply to the extradition and rendition of a fugitive.
- Certification does not order surrender; the Secretary of State makes that decision.
- A person committed and not delivered within two calendar months may apply for discharge.
Questions readers ask
Can a certification order be appealed?
Not directly. A certification is not a final judgment in a criminal case, and there is no statutory right of appeal from it. The established route is a petition for a writ of habeas corpus, and the scope of that review is narrow: whether the judge had jurisdiction, whether the offense is covered by the treaty, and whether there was any competent evidence supporting the finding of probable cause. The government may seek a new hearing before a different judge where a complaint is denied, since denial is likewise not appealable.
Does the person get a trial on the foreign charge?
No. The hearing asks whether the evidence of criminality is sufficient to sustain the charge under the applicable treaty, which is a probable cause style inquiry rather than a trial. Documents authenticated by the United States diplomatic or consular officer in the requesting country are admissible without the usual foundation. Defenses on the merits, challenges to witness credibility and most exculpatory evidence are excluded, on the reasoning that they belong to the trial that will occur abroad.
Can a United States citizen be extradited?
Yes, subject to the treaty. Some treaties oblige each party to surrender its own nationals and some do not. Where the treaty does not obligate the United States to extradite its citizens, federal law nevertheless permits the Secretary of State to order the surrender of a citizen whose extradition has been requested, provided the other requirements of the treaty are met. Nationality is therefore a matter for the executive decision rather than an automatic bar at the judicial stage.
Sources
- 18 U.S.C. § 3181 — Scope and limitation of chapterConditions the surrender provisions on an extradition treaty in force and states the narrow exception for violent crimes against United States nationals.
- 18 U.S.C. § 3184 — Fugitives from foreign country to United StatesProvides for a complaint under oath, a hearing on the evidence of criminality, certification to the Secretary of State and commitment pending surrender.
- 18 U.S.C. § 3186 — Secretary of State to surrender fugitivePlaces the surrender decision with the Secretary of State and authorizes delivery to the foreign government's agent.
- 18 U.S.C. § 3188 — Time of commitment pending extraditionPermits application for discharge where the person is not delivered and conveyed out of the United States within two calendar months of commitment.
- 18 U.S.C. § 3190 — Evidence on hearingMakes the certificate of the principal diplomatic or consular officer proof that the documents offered are properly authenticated.
- 18 U.S.C. § 3196 — Extradition of United States citizensPermits the Secretary of State to surrender a citizen where the treaty does not obligate surrender of nationals.
- Federal Rule of Criminal Procedure 1 — ScopeExcludes the extradition and rendition of a fugitive from the proceedings governed by the rules of criminal procedure.
Premier Defense Law is a publication, not a law firm. This article states general rules and cites its sources; it is not advice about any particular case, and the law differs by state and changes over time.
More in Extradition & Detainers
Dual Criminality and How Offenses Are Matched
Dual criminality asks whether the acts charged abroad would constitute a crime under the law of the requested state, without requiring identical elements or identical names. Older treaties list extraditable offenses; modern treaties define extraditability by a penalty threshold and apply the conduct comparison. Differences in criminalization, fiscal offenses, inchoate liability and extraterritorial reach produce most of the disputes.
Interstate Rendition and How a Demand Is Made
The Constitution obliges a state to deliver up a person charged in another state who is found within its borders, and federal statute supplies the mechanism. The demand must allege presence and flight and must attach a certified indictment, information supported by affidavit, affidavit before a magistrate, or judgment. If no agent appears within thirty days of arrest, the prisoner may be discharged.
Provisional Arrest Before a Formal Request
Provisional arrest is authorized by treaty for urgent cases where waiting for the full documentary request would risk flight. A federal complaint under oath supports a warrant, and the requesting state must transmit the formal request within the treaty's stated period. Release on expiry does not bar re-arrest once the papers arrive, and bail in extradition requires a showing of special circumstances.


