This Practice Note considers how to challenge the arbitral tribunal’s jurisdiction under Swedish law. It considers the arbitrator(s)/tribunal’s power to determine its own jurisdiction under section 2 of Swedish Arbitration Act and the court’s powers to review that decision. The arbitrators must consider separability and the doctrine of assertions in their deliberations. The Practice Note also covers the consequences of the tribunal finding that it does or does not have jurisdiction to determine the dispute. The Practice Note also covers the difference between a decision and an award on jurisdiction by the tribunal.