Maryland Affidavit of Service (Certified Mail) (Service of Process) is a legal process used to serve a defendant with a summons, complaint or other legal document. It is a method of service of process recognized by the court in the state of Maryland. It involves sending a document via certified mail, with return receipt requested, to the defendant. The Affidavit of Service (Certified Mail) (Service of Process) must then be completed by the recipient of the mail, and must be filed with the court. There are two types of Maryland Affidavit of Service (Certified Mail) (Service of Process): (1) Regular Certified Mail and (2) Certified Mail with Return Receipt Requested. Regular Certified Mail involves sending the document via certified mail, without return receipt requested, to the defendant. The Affidavit of Service (Certified Mail) (Service of Process) must then be completed by the recipient of the mail, and filed with the court. Certified Mail with Return Receipt Requested involves sending the document via certified mail, with return receipt requested, to the defendant. The Affidavit of Service (Certified Mail) (Service of Process) must then be completed by the recipient of the mail, and returned to the sender along with the return receipt. This document must then be filed with the court.