You can use interrogatories to find out facts about a case but they cannot be used for questions that draw a legal conclusion.
When a party to a civil case needs to get information from the other side, she can serve the other side with written requests called “discovery requests.” These requests might include: Interrogatories, which are written questions about things that are relevant or important to the case. (NRCP 33; JCRCP 33)
Interrogatories may, without leave of court, be served upon the plaintiff after filing of the complaint and upon any other party with or after service of the summons and complaint upon that party.
Service - A party may serve the other party with interrogatories by mailing them to the other party or by hand-delivery. In certain circumstances, service may be available electronically through the Maryland Electronic Courts (MDEC). Learn more about service of process.