Alfred Quaderer (20 April 1920 – 7 June 1944) was a Liechtenstein citizen who was executed by Switzerland in 1944 for spying on behalf of Nazi Germany.

[2] He worked in construction Feldkirch in 1939, from which he gained contacts with the Volksdeutsche Mittelstelle.

[3] Starting from 1941, he was deployed in Switzerland where he was tasked with gaining military intelligence, under the alias of a painter in Erstfeld.

[4] His activities included the seducing three local Swiss soldiers and bribing a corporal in order to obtain military intelligence.

[5] He was held in solitary confinement in St. Gallen until he was sentenced to death for treason against Switzerland in March 1944.