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.Here are some sample interrogatory objections, a cheat sheet that might help you determine how to object to interrogatories. Delivering legal papers is called "service of process". The law says that legal papers have to be "served" (delivered) the right way. Fill in the "certificate of service" on the last page before mailing them back to the other side. How To Respond To Requests for Production of Documents. You cannot send more than 30 questions to another party in a circuit court case. The Maryland Rules have form interrogatories that you can use as an example. Which are used in the Western District of New York.