A party may use one or more interrogatories which are part of a form set of interrogatories. A party may direct written interrogatories to any other party.A copy of the interrogatories shall be served on all other parties entitled to notice. The fact that the same counsel represents multiple parties does not change that each of those parties may serve up to 30 interrogatories. (e) Service and Filing. You must respond to all questions in the Marital Interrogatories, Custody Interrogatories, or Parental Allocation Interrogatories. (d) Party's Failure to Attend Its Own Deposition, Serve Answers to Interrogatories, or Respond to a Request for Inspection. If you fill out a form on a webpage, you will lose your progress. Each separately represented party may serve no more than twenty interrogatories upon each party. In some cases, the court will propound interrogatories for each party to answer.