Standard Family Law Interrogatories for Original or Enforcement Proceedings. Form Number 12.930(b).A certificate of service of the interrogatories must be filed, giving the date of service and the name of the party to whom they were directed. An interrogatory is a request for information, in the form of standard questions, that must be answered in writing and then notarized. Interrogatories are written questions that either the defense or the plaintiff involved in litigation can send to the opposing attorney. Interrogatories are only exchanged between the actual parties in a lawsuit. The parties means the plaintiffs and defendants. You must also indicate which questions you are asking the other party to answer. Once the Clerk issues your Notice of Action, you are responsible for arranging service with a newspaper of general circulation in Palm Beach County. And Yes, nobody efiles interrogatories (questions), only discovery notices are efiled.