Massachusetts Defense Certificate of Discovery Compliance is a legal document required by the Massachusetts Supreme Judicial Court when filing a criminal action. The Certificate of Discovery Compliance outlines the steps taken by the defense to fulfill its obligation to obtain, review, and produce discovery materials to the prosecution. The certificate must be signed by the defense attorney and filed with the court prior to the trial date. There are three types of Massachusetts Defense Certificate of Discovery Compliance: 1) The Initial Certificate of Discovery Compliance, which must be filed at least seven days before trial; 2) The Supplemental Certificate of Discovery Compliance, which must be filed whenever new evidence is discovered; and 3) The Final Certificate of Discovery Compliance, which must be filed at the time of the trial. All three types of Massachusetts Defense Certificate of Discovery Compliance must be signed by the defense attorney, include a list of all discovery materials produced to the prosecution, and demonstrate that all reasonable efforts have been taken to obtain the materials.