Md. Code, Estates and Trusts § 5–401

(a) Judicial probate is a proceeding instituted by:

(1) The filing of a petition for probate by an interested person, or creditor, with the court for the probate of a will; or

(2) A determination of the intestacy of the decedent, and for the appointment of a personal representative.

(b) The proceeding is conducted after notice as provided in § 5–403 of this subtitle, and is final except as provided in § 5–406 of this subtitle.

(c) If no petition is filed within a reasonable time the register may file it with the approval of the court.