States have an obligation under the Refugee Convention and under
customary international law to respect the principle of non-refoulement. When
this principle is violated or threatens to be, UNHCR respond by intervening
with relevant authorities, and if it deems necessary, will inform the public.
In some circumstances, persons facing refoulement may have recourse to
relevant human rights mechanisms, such as the Committee against Torture
(see a reference to these human rights mechanisms on page 17).