Md. Code, Estates and Trusts § 15–307

(a) A person who participates in the acquisition, disposition, assignment or transfer of a security by or to a fiduciary, including a person who guarantees the signature of the fiduciary, shall have the immunity from liability described under § 5-421(b) of the Courts and Judicial Proceedings Article.

(b) If a corporation or transfer agent makes a transfer pursuant to an assignment by a fiduciary, a person who guaranteed the signature of the fiduciary shall have the immunity from liability described under § 5-421(c) of the Courts and Judicial Proceedings Article.

(c) This section and § 5-421 of the Courts and Judicial Proceedings Article do not impose any liability upon the corporation or its transfer agent.