The decision to go into hiding was not simple. It meant finding a hiding place, having adequate financial means, and being able to count on external help. Initially, all hope was pinned on getting an exemption from deportation. Certain groups of Jews were eligible for an exemption: officials of the Jewish Council, Jews who were married to non-Jews, Jews who were useful to the German war industry, and people whose Jewish status was still under consideration
by the Germans. They were given exemption from forced labour 'until further notice', but this type of exemption did not guarantee safety in the long-term. According to estimates, around 25,000 out of the roughly
140,000 Jews in the Netherlands went into hiding. Approximately one third of these were found and rounded up.