The Police Commissioner of Maastricht requested that Isidore Schaap and Frederika Roza Schaap-Kamerling, both living in Maastricht, be located, detained and brought to trial. They were suspected of having changed their place of residence without the required authorization. This description referred to Jews who had gone into hiding.
Algemeen Politieblad, nr 37, 17 September 1942, 1044, notice 1931