As the Allies advanced into Germany in April 1945, Philipp was transferred to the Dachau concentration camp. After only ten days, he was transferred to Tyrol to Hotel "Bachmann" along with about 140 other prominent prisoners (for example Kurt Schuschnigg, Bogislaw von Bonin, Hjalmar Schacht, Martin Niemöller, Georg Thomas, and Alexander von Falkenhausen), freed by the Wehrmacht on 30 April 1945 (SS-Obergruppenführer Karl Wolff received a telephone call from the SS guards and ordered them to hand over the prisoners to the German army officers Hauptmann Wichard von Alvensleben and Hauptmann Gebhard von Alvensleben), where he was then arrested by U.S. troops on 4 May 1945 in Niederdorf in the Italian Dolomites.