CV-Certificate of Service (Service of Papers Other than Citation). You are not required to file discovery requests or responses to discovery requests with the clerk.SERVICE TO BE ISSUED ON (Please List Exactly As The Name Appears In The Pleading To Be. Served):. This guide is intended to be a summary of basic discovery procedures. No request for discovery may be served on an opposing party without permission of the court. The following forms are available for downloading, printing and completing. All documents must be filed electronically with the Harris County District Clerk. Documents should not to be hand-delivered or faxed directly to the court. This article explains "requests for production," which are a tool for gathering evidence in a lawsuit as part of discovery. Subdivision (b)(3)—Trial Preparation: Materials.