This Order must be filed in the clerk's office at least 10 days before the court date and a copy delivered to Police Liaison. Discovery is a pre-trial procedure for obtaining information and evidence in a lawsuit.Virginia family law cases feature several forms of discovery. Discovery documents are not filed with the clerk unless the court so directs. Certificate of Service. Process, for which no particular mode of service is prescribed, may be served upon natural persons as follows: 1. List each document that you served. Or complete discovery or to reply to discovery motions. By substituted service in the following manner: a. Complete a Certificate of Mailing, deliver it to the judge on the court date or file it with the clerk's office before the date of the trial.