The Shifren principle came about in the Appellate decision of SA Sentrale Koop Graanmaatskappy Bpk v Shifren en Andere 1964 (4) SA 760 (A). This principle is set out in Brisley v Drotsky 2002 (4) SA 1 (SCA) as follows: 'contracting parties may validly agree in writing to an ...