The Maryland Certificate of Service is a legal document issued by the Maryland court system to certify that a copy of a document has been sent to a party in a legal case. It is used to provide proof that the court and parties have been properly notified of a legal proceeding. The Certificate of Service is completed by the party sending the document and must be signed and notarized. It is then filed with the court. There are two types of Maryland Certificates of Service. The first is a Civil Certificate of Service, which is used when filing a document in a civil case. The second is a Criminal Certificate of Service, which is used when filing a document in a criminal case. Both types of Certificates of Service must contain the same information, including the name of the court, the case number, the date of service, the names and addresses of the parties, the type of document being served, and the signature of the sender.