Form Interrogatories are a list of questions on a court form. This guide contains forms and instructions for propounding Special Interrogatories on your opponent in a California civil case.Each interrogatory shall be full and complete in and of itself. What are Interrogatories? When making interrogatories, you must create written questions, label them as "interrogatories," and demand the other party answer them in a letter. You must answer interrogatories within 30 days from service. If not, you will be forced to answer and probably end up paying HIS attorney fees. In providing responses to interrogatories, you have a general duty to conduct a reasonable investigation to obtain responsive information. Interrogatories are a collection of written questions you can send to the opposing party in a lawsuit. When making interrogatories, you must create written questions, label them as "interrogatories," and demand the other party answer them in a letter.