Md. Code, Family Law § 5–346

(a) Within 5 days after a petition for adoption of a child is filed under this Part IV of this subtitle with a juvenile court, the clerk shall send a copy of the petition, with the notice of filing that was attached to the petition, to:

(1) the local department; and

(2) the child’s last attorney of record in the guardianship case.

(b) Notice under this section shall be by first-class mail.