It helps if you fill in the top part of the form with the case and court information. A party may serve on any other party no more than 25 written interrogatories, including all discrete subparts.Interrogatories are a discovery tool (among many) used in lawsuits in New York courts. In sum, these are written questions seeking specific information. Unless otherwise specified in the preliminary conference order, only 25 interrogatories may be served in any action, including consolidated actions. Use this "At A Glance Guide" to learn the statewide rules of civil procedure applicable to responding to interrogatories in New York Supreme Court. Service of interrogatories. Form Interrogatories are a list of questions on a court form. FOLLOW-UP INTERROGATORIES TO UNITED STATES POSTAL SERVICE. Exempt from responding to the interrogatories. (Superior.