Here's a scenario I've seen more than once: a client gets extradited on a single fraud charge, arrives in the requesting country, and within weeks finds prosecutors adding three additional charges that were never mentioned in the extradition request — one of them from an entirely unrelated incident years earlier. Is that allowed? Generally, no. That's exactly what the specialty principle exists to prevent.
The rule of specialty — sometimes just called "specialty" — is a core protection built into nearly every extradition treaty. It says that once a person is extradited, the requesting country can only prosecute or punish them for the specific offense or offenses named in the extradition request that was granted. They can't turn around and prosecute the person for something else entirely, something that wasn't part of the deal the requested country agreed to.
The logic is straightforward: extradition is a serious step that requires a country to hand over someone within its own borders, based on a specific review of specific alleged conduct. If the requesting state could add unrelated charges afterward, the whole review process — the dual criminality check, the human rights screening, the judicial hearing — would be meaningless, because the requested country never actually agreed to what's actually being prosecuted.
So what does specialty actually protect against? Mainly:
Being tried for offenses that weren't disclosed in the extradition request. Being tried for conduct that occurred before the extradition and wasn't part of the request, even if related in some loose sense. In many treaty frameworks, being subjected to a harsher penalty than what was contemplated when extradition was granted.
Now, the limits. Specialty isn't absolute, and I always make sure clients understand its boundaries before assuming it's bulletproof.
Consent. If the requesting state goes back to the requested state and asks for permission to prosecute additional charges — and gets it — specialty no longer blocks those charges. This happens fairly often; it's essentially a second, narrower extradition request layered on top of the first.
The waiver period. Most treaties include language allowing prosecution for other offenses if the person had the opportunity to leave the requesting country after their case concluded and chose to stay, typically for a defined window — commonly around 45 days, though the exact number varies by treaty. The theory is that once free to leave, the person's continued presence is voluntary, and specialty protection lapses.
Explicit waiver by the individual. In some systems, a person can voluntarily waive their own specialty protection, sometimes as part of a plea negotiation.
How enforcement actually works once someone is already abroad. This is the practical question clients ask once they understand the principle: if a prosecutor in the requesting country ignores specialty and files additional charges anyway, what actually happens? Usually, the person's defense lawyer in that country raises the specialty violation directly with the trial court there, since domestic courts in extradition-friendly systems generally recognize and enforce specialty as binding on their own prosecutors. If that fails, there's often a diplomatic channel too — the requested country can, at least in principle, formally object to the requesting country's government for exceeding the terms of the extradition it granted, which can carry real weight given that future extradition cooperation between the two countries depends on this kind of good faith being maintained. This is one of several reasons it helps enormously to have counsel who can coordinate, even informally, with a lawyer in the requesting country from early in the case.
Specialty and civil or collateral proceedings. A less obvious wrinkle: does specialty only protect against new criminal charges, or does it also limit how information gathered during the extradition process gets used elsewhere — in a civil lawsuit, an unrelated regulatory proceeding, or a tax matter, for instance? Treaty language varies here, and it's a genuinely underexplored area in a lot of extradition practice. I always flag it explicitly when reviewing a request, because assuming specialty covers everything it should, rather than confirming what the specific treaty text actually says, is a mistake I've seen other lawyers make.
A comparative note. Frameworks like the European Arrest Warrant handle specialty somewhat differently than traditional bilateral treaties — some EAW-participating states have moved toward broader consent-based exceptions or allow member states to opt out of the specialty rule altogether in their mutual dealings, which is a meaningful divergence from the more protective default found in most classic bilateral extradition treaties. Which regime applies is, again, one of the first things worth confirming.
I've used specialty violations successfully to get additional charges dismissed after extradition, and it's also something worth negotiating proactively — sometimes as part of the original extradition request review, flagging exactly what conduct is and isn't covered so there's a clean record to point back to later if the requesting state tries to expand the case.
This article is provided for general informational purposes only and does not constitute legal advice. Extradition, INTERPOL, and international criminal matters are highly fact-specific. Readers facing an actual or anticipated matter should seek advice from qualified counsel before making decisions.