One of the requirements for issue estoppel is identity of issue. However, the process of ‘refining down’ or ‘salami-slicing’[1] is not always clear. The argument that the issue is different because the two courts would arrive at different conclusions on the governing law is increasingly being utilised as a litigation strategy. If the first court applied its choice of law rules to determine that the governing law of the claim is Utopian law, would an issue estoppel arise over this decision in the second court if under the second court’s choice of law rules, Ruritanian law is the governing law? The answer depends on whether the ‘slice’ is thick or thin. Is the relevant issue ‘What law governs the dispute or issue?’ or ‘What law is identified by our (forum) choice of law rules to govern the dispute or issue?’ Read more