During the last years of the war, Fiep stayed with her family in Zaltbommel and the surrounding area. The inhabitants of Zaltbommel were driven out of their houses by the Germans because the town was situated in a strategic position on the as a defence line). The 
Westendorp family found accommodation in Haaften and later in Opijnen, where Fiep worked at the Town Hall, forging documents and passports. Her talent for drawing also came in handy for making ground plans of the banks of the Waal.