To address a lack of jurisdiction in your legal case, start by identifying whether the court has the necessary subject-matter and personal jurisdiction over the matter. Research the relevant jurisdictional rules, statutes, and precedents to confirm if the court is the appropriate venue. If a jurisdictional issue is identified, promptly file a motion to dismiss the case for lack of jurisdiction or request a transfer to a court with proper authority. Notify all parties involved to maintain transparency and prevent confusion. If needed, consult a legal expert in jurisdictional matters to ensure you're following the correct procedures. Address the jurisdictional challenge early in the case to avoid delays, unnecessary legal costs, and complications, ensuring that the case is heard in the appropriate legal forum.