Hendrika Sassenus-Alter died at the age of 86 on 19 January 1943 in camp Westerbork. She was buried in the Jewish cemetery in Assen on 21 January 1943.
Jewish Historical Museum, Documents collection, inv.nr 3397; Death register of the Jewish community Assen
The funeral records at the Jewish cemetery in Assen reveal that Hendrika Alter was buried there.
This person is commemorated on a memorial in Assen. More information on this memorial can be found (in Dutch) on the website of the Nationaal Comité 4 en 5 mei.