The answering party shall attach the necessary oath and certificate of service to the answers. (a) Discovery Methods.Manner of serving process upon natural persons. Write the address of the party where you mailed the copy to or where you hand delivered the copy. Discovery is a pre-trial procedure for obtaining information and evidence in a lawsuit. Virginia family law cases feature several forms of discovery. Generally speaking discovery is not filed with the court unless there is a disputed motion. A certificate of service is a legal document filed in court that confirms courts documents were correctly delivered to the other party in a case. Of Virginia and the rules of court for obtaining discovery. Discovery requests must be pertinent to substantial issues in the proceeding.