Delaware’s escheator and MoneyGram Payment Systems Inc. have asked a Pennsylvania district court judge to dismiss a lawsuit seeking to recover $10.3 million in unclaimed checks for lack of jurisdiction, arguing that only the U.S. Supreme Court has the authority to hear a case the defendants cast as a controversy between two states.

Pennsylvania Treasurer Timothy A. Reese and Pennsylvania’s Treasury Department filed the complaint Feb. 26 in the U.S. District Court for the Middle District of Pennsylvania, claiming that Delaware was improperly holding the funds, which Reese said should have been submitted to its neighbor to the north.