How to Use Discovery. Fill out the form in this booklet.A copy of the discovery request letter and any response must also be filed with the clerk's office. (b). Parties may obtain discovery regarding any matter, not privileged, which is relevant to the subject matter involved in the pending action. Massachusetts Discovery Practice is the Massachusetts lawyer's essential guide to discovery and investigation in the information age. Parties may obtain discovery regarding any matter, not privileged, which is relevant to the subject matter involved in the pending action. Massachusetts recently adopted a version of the Uniform Trade Secrets Act (UTSA) that became effective on Oct. Rule 14(a) sets out the automatic discovery obligations of both the defendant14 and prosecution. The first edition of this handbook was prepared in the fall of 1995. Excise Tax Abatement Application.