A treaty starts a legal process, not an automatic transfer
An extradition treaty gives countries a shared procedure for requesting people accused or convicted of crimes. It can require each side to consider qualifying requests, but it does not make the requesting country’s accusation a command. The requested country still applies its own laws and the treaty’s conditions before anyone is handed over.
A court may check whether the request meets basic requirements, such as whether the alleged conduct is a crime in both countries. That principle is called dual criminality. The court is not deciding whether the person is guilty; it is deciding whether the legal conditions for transfer have been met. Depending on the treaty and local law, the person may also be able to challenge the request on other grounds.
Fairness concerns can stop the handoff
Extradition can be refused when sending someone would expose them to serious risks, such as torture or a trial process that cannot provide basic fairness. Some agreements also allow refusal for political offenses or when the case would be discriminatory. These are not identical rules everywhere: the treaty and the requested country’s legal system determine which grounds apply and who decides.
The decision may involve both judges and government officials. A court can assess whether the law permits surrender, while an executive authority may have a role in the final decision. A requesting country can sometimes offer assurances about treatment or trial conditions, but the receiving country must decide whether those promises address the specific concern.
That is why a treaty can make cooperation possible without guaranteeing it. The requesting country must persuade the other side not only that it wants the person, but that the transfer meets the safeguards both systems recognize.
