Fill in the case information. Fill in all blanks on the first page.On each page, write in the page number and the total. The person serving at the counter will be issued a receipt identifying the date received, entity being served, fee payment and case number, if available. Be sure to sign your responses. Fill in the "certificate of service" on the last page before mailing them back to the other side. Parties may obtain discovery regarding any nonprivileged matter that is relevant to any party's claims or defenses and proportional to the needs of the case. Also, find out how "discovery" can be used to get the documents and evidence you need to support your case. Overview. Discovery in a personal injury case allows the parties to learn about the facts of their case and build their evidence for trial. Please take a few minutes to fill out a brief survey, available in English and Spanish.