Dr. Manfred Zapp (born 1903 in Dusseldorf) was the head of the American section of Germany’s Transocean News Service. On August 29, 1938 he arrived in New York as the director of Transocean. Prior to his arrival in America he ran Transocean in South Africa. Zapp was familial with America having visited the country earlier in 1931 and 1932 giving lectures in the Seattle area and Canada.
On March 11, 1941 Zapp and his Transocean colleague Guenther Tonn were arrested and later convicted for not registering as foreign agents. In retaliation the Germans arrested United Press reporter Richard C. Hottelet, newspaperman Jay Allen, and US consulate employees Frank Nelson and Ivan Jacobsen who worked at the American embassy in Oslo, Norway on charges of espionage. In July 1941 the four Americans were exchanged for the release of Zapp and Tonn.
On April 16, 1945 Manfred Zapp was captured and taken prisoner at Bad Berka, Germany by the United States Third Army. As of May 1957 Zapp was living in his home town of Dusseldorf.
- Portugal als autoritärer Staat (1937)
- Zwischen Wallstreet und Kapitol, politiker und politik in USA (1943)
- Foreign Agents Registration Act: United States v. Transocean News Service, et al., (D.D.C. March 11, 1941) (Manfred Zapp and Guenther Tonn)