Individuals suspected of terrorism should never be returned to a country where they risk torture and ill-treatment. Promises of fair treatment by states with well-known records of torture are inherently unreliable, and governments that justify returns through such promises, known as “diplomatic assurances,” are violating the absolute prohibition against torture and eroding a fundamental principle of international law. The death penalty, however reprehensible, is legal and usually carried out publicly. But torture is illegal and practiced in secret. Governments routinely lie about whether they’re torturing people or not, and in some situations they may not even have adequate control to guarantee security. This 39-page report documents cases where governments returned or considered returning suspects on the basis of such formal guarantees, and raises concern that in some cases, those returned were, in fact, tortured or ill-treated.