The Ex Turpi Causa Principle in Hounga and Servier

In Hounga v Allen the majority of the Supreme Court employed a test for the application of the ex turpi causa defence involving the balancing of public policy arguments for and against allowing the defence. Although this has attracted some early academic support, this note will argue it is inconsistent with authority and principle. The later decision in Servier v Apotex does not address the Hounga decision directly but strongly endorses a more conservative approach to the ex turpi causa principle. The resulting tension between these two Supreme Court decisions is likely further to destabilise the law in this area. This note advances arguments in favour of the Servier approach, summarises both decisions in terms of their consistency with authority and considers the ways in which Servier may have limited the effects of Hounga.