This assignment analyzes the concept of jurisdictional error within the context of Australian immigration law. It examines the case of *Singh v Minister for Immigration & Anor [2017] FCCA 1901*, where the Federal Circuit Court found that the Tribunal's decision constituted a jurisdictional error due to its failure to consider relevant factors and adopt an unreasonable approach to interpretation. The assignment delves into legal principles established in cases like *Kirk v Industrial Court NSW [2010]* and *Re Refugee Review Tribunal; Ex parte Aala [2000]*, highlighting how they apply to the specific circumstances of *Singh v Minister for Immigration*.