Notarized documents containing a handwritten signature and physical seal may be submitted for efiling. What parents and witnesses need to know about character reference letters to the court for child custody.Includes a downloadable sample and template. Find a national federal court form. National court forms can be used in all federal courts. Massachusetts Family Member Proof of Residency Letter Template. A subpoena (pronounced supppeena) is a letter that asks someone who isn't directly involved in your court case to testify under oath about a specific topic. The Ma Civil Cover Sheet form is a critical document required for filing a civil lawsuit in the Superior Court of Massachusetts.