Maryland Code, Estates and Trusts § 7-404

(a) In the absence of actual knowledge or of reasonable cause to inquire as to whether the personal representative is improperly exercising the power of the personal representative, a person dealing with the personal representative is not bound to inquire whether the personal representative is properly exercising the power, and is protected as if the personal representative properly exercised the power.

(b) A person is not bound to see to the proper application of estate assets paid or delivered to a personal representative.