Maryland Code, Courts and Judicial Proceedings § 3-208

(a) If a party denies existence of the arbitration agreement, he may petition a court to stay commenced or threatened arbitration proceedings.

(c) If the court determines that existence of the arbitration agreement is in substantial and bona fide dispute, it shall try this issue promptly and order a stay if it finds for the petitioner. If the court finds for the adverse party, it shall order the parties to proceed with arbitration.