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
In addition, a Jokos file (number 17503) on this family is at the Amsterdam Municipal Archive. Access is subject to authorization from the Stichting Joods Maatschappelijk Werk. The Jokos file reveals that a claim was lodged for compensation for valuables surrendered to the Lippmann-Rosenthal looting bank (L-claim, number 10590/22425).