A party may propound interrogatories at any point up to thirty (30) days before the end of the discovery period. 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. Interrogatories are a helpful tool for discovery. Interrogatories are written questions which focus on any information relevant to the case. Information about Justice Court Suits and Civil Cases in the Harris County Justice of the Peace Courts. The following forms are available for downloading, printing and completing. A party must make a complete response to each interrogatory. Some county websites or court websites upload commonly used legal forms as a public service. Com for more instructions.