To extradite someone is to formally transfer them from one government’s custody to another’s so they can face criminal charges or serve a sentence already imposed. That is the working extradite definition in U.S. law, and it covers two very different tracks: one between U.S. states, governed by the Constitution and federal statute, and one between countries, governed by treaty. The process exists so that crossing a border, whether a state line or an international one, does not become a way to escape prosecution.
Where the Legal Authority Comes From
For transfers between states, the authority is constitutional. Article IV, Section 2 provides that a person charged with a crime in one state who flees to another “shall on Demand of the executive Authority of the State from which he fled, be delivered up, to be removed to the State having Jurisdiction of the Crime.”1Congress.gov. Article IV Section 2 Clause 2 The duty is mandatory. In 1987 the Supreme Court confirmed that federal courts can enforce it and that a governor has no discretion to refuse a properly made demand.2Legal Information Institute. Puerto Rico v Branstad Congress added procedural detail in 18 U.S.C. § 3182, which spells out what the requesting state has to send with its demand.3Office of the Law Revision Counsel. 18 USC 3182 – Fugitives From State or Territory to State, District, or Territory Most states have also adopted the Uniform Criminal Extradition Act, which fills in the day-to-day mechanics.
International extradition works on a different foundation. Under 18 U.S.C. § 3181, the government’s power to surrender a person to a foreign country exists only while an extradition treaty with that country is in force.4Office of the Law Revision Counsel. 18 USC 3181 – Scope and Limitation of Chapter The United States has such treaties with more than 100 countries. Without one, there is generally no legal obligation to hand anyone over.
The Three Limits That Decide Whether Extradition Happens
Three principles run through international extradition practice, and each one can stop a transfer that would otherwise go forward.
Dual Criminality
The conduct behind the request must be a crime in both countries. The State Department describes dual criminality as “a threshold requirement in extradition, that the conduct for which extradition is sought must be a crime under the laws of both the requesting and the requested countries.”5U.S. Department of State Foreign Affairs Manual. 7 FAM 1610 Introduction – Section: 7 FAM 1612 International Extradition Terms and Definitions If the behavior is legal where the person is now, the request can fail on that ground alone.
Rule of Specialty
After someone is extradited, the receiving country can prosecute them only for the crimes listed in the extradition request. The State Department calls this “a principle, reflected in virtually all extradition treaties, under which the requesting state may, after the fugitive has been surrendered to it, prosecute or punish the fugitive only for the crime or crimes for which extradition was granted.”5U.S. Department of State Foreign Affairs Manual. 7 FAM 1610 Introduction – Section: 7 FAM 1612 International Extradition Terms and Definitions Adding charges for other conduct requires going back to the surrendering country for permission.
Political Offense Exception
Most treaties let the requested country refuse to extradite for offenses that are political in nature rather than ordinary crimes. The exception has narrowed over time, especially for acts of violence, and many modern treaties expressly exclude terrorism-related offenses from it even when they have political motivations.
How Interstate Extradition Works
When someone is wanted in one state and found in another, the governor of the requesting state sends a formal demand to the governor of the holding state. The demand must come with either a copy of the indictment or a sworn affidavit charging the person with a crime, along with any arrest warrant, and the papers must be certified as authentic by the requesting governor.3Office of the Law Revision Counsel. 18 USC 3182 – Fugitives From State or Territory to State, District, or Territory
If the governor of the holding state finds the demand in order, that governor issues a warrant for the person’s arrest. The arrested person is brought before a judge, but the hearing is tightly limited. The court does not look at guilt or innocence. It looks at whether the paperwork is valid and whether the person in custody is the person named in the warrant. Identification and document sufficiency are essentially the whole fight.
Federal law puts a hard clock on the process. If no agent from the requesting state shows up within 30 days of the arrest, the person can be released.3Office of the Law Revision Counsel. 18 USC 3182 – Fugitives From State or Territory to State, District, or Territory
The constitutional language reaches “Treason, Felony, or other Crime” with no minimum severity.6Congress.gov. Overview of Extradition (Interstate Rendition) Clause A misdemeanor, in theory, triggers the duty. In practice, most states will not spend the money to extradite for minor offenses, but that is a budget choice, not a legal one.
How International Extradition Works
International cases run on a longer track with both judicial and executive review. Under 18 U.S.C. § 3184, a federal judge or magistrate can issue a warrant for the arrest of a person in the United States who is charged with a crime in a treaty country. The person is brought before the judge for a hearing on the evidence. If the judge finds the evidence sufficient under the applicable treaty, the judge certifies that finding, along with the testimony, to the Secretary of State, and the person is held pending the Secretary’s decision.7Office of the Law Revision Counsel. 18 USC 3184 – Fugitives From Foreign Country to United States
The Secretary of State makes the final call on surrender. If approved, the person is delivered to an authorized agent of the foreign government, who transports them out of the country.8Office of the Law Revision Counsel. 18 USC 3186 – Secretary of State to Surrender Fugitive That split between court and executive is a diplomatic check the interstate process does not have.
Evidence in these cases must be authenticated to be admissible, and the certificate of a senior U.S. diplomatic or consular officer in the requesting country stands as proof of proper authentication.9Office of the Law Revision Counsel. 18 USC 3190 – Evidence on Hearing
There is also a time limit on custody. If the person is not surrendered and removed from the United States within two calendar months after being committed, a judge can order their release on reasonable notice to the Secretary of State.10Office of the Law Revision Counsel. 18 USC 3188 – Time of Commitment Pending Extradition
Rights of the Person Facing Extradition
An extradition proceeding is not a criminal trial, and the court does not decide whether the person committed the underlying crime. Still, there are meaningful rights inside the process.
The main tool for challenging detention is a petition for habeas corpus. Through habeas, the person can argue that the paperwork is deficient, that they are not the person named in the warrant, that the offense is not covered by the treaty, or that dual criminality is not satisfied. A claim that the request is really aimed at a political offense can also come in through habeas review.
Bail is handled very differently depending on the track. In interstate cases, many states allow bail under their own rules. In international cases, release on bail is “extremely rare.” The Supreme Court has held that bail is available only in “special circumstances,” which lower courts read narrowly, such as serious medical conditions that cannot be adequately treated in jail.11U.S. Department of State Foreign Affairs Manual. 7 FAM 1630 Extradition of Fugitives From the United States
The right to counsel is less protected than many assume. Most courts have held that there is no constitutional right to appointed counsel in extradition proceedings, because extradition is not itself a criminal prosecution. Anyone facing extradition should still retain an attorney where possible, since the available defenses are technical and the deadlines are short.
Waiving Extradition
A person can skip the formal process and agree to be transferred. In interstate cases, that means signing a waiver and being handed over to agents from the requesting state without a governor’s warrant or hearing. In international cases, the person signs an affidavit of consent and a judge confirms that the waiver is knowing and voluntary before certifying the extradition.
Waiving has real strategic value in some cases. Fighting extradition can mean weeks or months in a jail far from where the charges will actually be decided, and none of that time moves the underlying case forward. Waiving gets the person to the trial jurisdiction faster, lets defense work begin sooner, and sometimes leads to better bail treatment on arrival. The trade-off is giving up any procedural challenges to the extradition papers, which is why the decision belongs with a defense lawyer who can judge whether those challenges are worth making.
Human Rights Limits on International Extradition
Bilateral treaties are not the only constraint. Broader human rights obligations can block an international transfer outright.
The United Nations Convention Against Torture prohibits a signatory from extraditing a person to a country “where there are substantial grounds for believing that he would be in danger of being subjected to torture,” and requires authorities to consider whether the requesting country shows “a consistent pattern of gross, flagrant or mass violations of human rights.”12OHCHR. Convention Against Torture and Other Cruel, Inhuman or Degrading Treatment or Punishment
The death penalty creates a separate barrier. Many countries, especially in Europe, will refuse to extradite anyone facing a possible death sentence, and the European Court of Human Rights has held that extradition to a country where there is a real risk of execution violates the European Convention on Human Rights. When the United States seeks extradition from those countries for capital-eligible crimes, it typically has to assure the surrendering country that the death penalty will not be sought or carried out. Those assurances have become routine, and U.S. prosecutors generally accept them rather than lose the extradition.