Interrogatories are one form of discovery in a lawsuit. An interrogatory is a written question from one party to the lawsuit to another party to the lawsuit.The Maryland Rules have form interrogatories that you can use as an example. Maryland Rule 2-421 governs the manner in which Maryland personal injury attorneys may ask and answer interrogatories. All parties are limited to 30 interrogatories (written questions) sent to any other one party in the case. Fill in the Certificate of Service at the bottom of the Answer. Do not forget to file your answer with the Clerk of Court. If you win your case, your judgment is recorded in the court in which you won. There is an automatic. What are Interrogatories in a Divorce?