Massachusetts Filing of Impounded Information is a process by which certain documents related to a case are held in a secure location. This is done to protect the information from public disclosure, or to preserve the information for use in future proceedings. The impoundment process is typically used in cases involving minors, certain types of civil litigation, and certain criminal matters. The two primary types of Massachusetts Filing of Impounded Information are general impoundment and special impoundment. General impoundment applies to all documents related to a case and is typically done at the beginning of a case. Special impoundment applies to specific documents related to a case and is typically done during the course of a case.