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. File the praecipe and writ of execution, the writ notice, major exemption, and the claim for exemptions. Here are some sample interrogatory objections, a cheat sheet that might help you determine how to object to interrogatories. The court requires proof of service. The person who served the documents should fill out an affidavit of service. Interrogatories may, without leave of court, be served upon the plaintiff after commencement of the action and upon any other party with or after service of the. Here are some sample interrogatory objections, a cheat sheet that might help you determine how to object to interrogatories. Form 47. Interrogatories.