When a sheriff serves or attempts to serve a paper he shall file a return with the clerk of the court that issued the paper stating whether or not the paper was served, and other information required by rule or law.
Md. Code, Courts and Judicial Proceedings § 2-303, under Article — Courts and Judicial Proceedings.
Md. Code, Courts and Judicial Proceedings § 2-303
When a sheriff serves or attempts to serve a paper he shall file a return with the clerk of the court that issued the paper stating whether or not the paper was served, and other information required by rule or law.