The Nazis forced him to leave Germany and to emigrate to England due to his political stance and his Jewish origins.
He remained active in scholarly pursuits, traveling to the United States in 1936 to speak at the Riccobono Seminar at the Catholic University of America on the topic "Invention of the Science of Roman Law at Rome.
Schulz also became Honorary Professor at the University of Bonn (1951) and member of the Accademia Nazionale dei Lincei in Rome (1952).
Werner Flume, one of Germany's most influential jurists in the second half of the 20th century, is a pupil of Fritz Schulz.
Even though he followed the prevalent scientific trend of his day and tended to assume a large number of interpolations in the Roman texts, his contributions are still valuable and are cited frequently.
His book "System der Rechte auf den Eingriffserwerb", published in 1909, is still seen as an important contribution to the German Law of Unjustified Enrichment today.