The war-responsibility trials in Finland (Finnish: Sotasyyllisyysoikeudenkäynti, Swedish: Krigsansvarighetsprocessen) were trials of the Finnish wartime leaders held responsible for "definitely influencing Finland in getting into a war with the Soviet Union and United Kingdom in 1941 or preventing peace" during the Continuation War, 1941–1944. Unlike other World War II war-responsibility trials, the Finnish trials were not international. The trials were conducted from November 1945 through February 1946 by a special court consisting of the presidents of the Supreme Court of Finland, the Supreme Administrative Court of Finland, a professor from the University of Helsinki and twelve MPs appointed by the Parliament of Finland.
The Moscow Armistice, signed September 19, 1944, contained the following Article 13:
Finland undertakes to collaborate with the Allied powers in the apprehension of persons accused of war crimes and in their trial.
The Finns initially thought that the trials would be for conventional war crimes. However, as the Moscow Declaration of October 30, 1943 made clear, the Allied powers intended to prosecute for other actions as well.
The Allied Control Commission and the Communist Party of Finland raised the issue of the trials repeatedly during the spring and summer of 1945. When the Treaty of London (London Charter) August 8, 1945 defined three types of crimes, war crimes, crimes against peace and crimes against humanity, it became evident that Finland couldn't be the only country fighting on the German side where leaders wouldn't be convicted. On September 11, the parliament passed a law enabling prosecution of those responsible for war. The Supreme Court of Finland and leading judicial experts protested the law as conflicting with the constitution of Finland and contrary to Western judicial principles (it was designed to apply retroactively), but they didn't comment on the political necessity of it. The Finnish public regarded it as a mockery of the rule of law. Juho Kusti Paasikivi, who was the prime minister of Finland at the time, is known to have stated that the conditions of the armistice concerning this matter disregarded all laws.