(a) In this section, 'subpoena' means a subpoena, summons, warrant, or court order that appears on its face to have been issued on lawful authority. (b) A fiduciary institution may disclose or produce financial records or information derived from financial records in compliance with a subpoena served on the fiduciary institution, if: (1) The subpoena contains a certification that a copy of the subpoena has been served on the person whose records are sought by the party seeking the disclosure or production of the records; or (2) Contains a certification that service has been waived by the court for good cause.
Maryland Legal Code