The Soviets said Raoul Wallenberg died in a Moscow prison in 1947; Sweden's tax agency declared him dead in 2016, and a Moscow court refused his family the prison records

Raoul Wallenberg was a Swedish diplomat in Budapest in 1944. He issued protective passes and is credited with helping at least 20,000 Hungarian Jews escape the Holocaust. In 1945 the Red Army arrested him. In 1957 the Soviet Union said he had died of a heart attack in prison on 17 July 1947; another report suggested he was alive six days later. His affairs were managed by a trustee. On 26 October 2016, on the trustee's application, the Swedish Tax Agency declared him dead with a formal date of 31 July 1952, under the rule that a missing person presumed dead is declared dead five years after the disappearance. The agency said the date was administrative. In July 2017 relatives, including his niece Marie Dupuy, sued Russia's Federal Security Service in Moscow's Meshchansky District Court for uncensored prison register entries from the Lubyanka and Lefortovo prisons for 1945 to 1947. The FSB said the files held personal information about other prisoners, and argued that it was not technically the successor to the NKVD. On 18 September 2017 the court dismissed the suit.