Interrogatories are a discovery tool (among many) used in lawsuits in New York courts. In sum, these are written questions seeking specific information.A party may serve on any other party no more than 25 written interrogatories, including all discrete subparts. 1. Except as otherwise provided herein, after commencement of an action, any party may serve upon any other party written interrogatories. In many civil actions, before the case is resolved there takes place a process known as pretrial discovery. This summary describes the process. In Florida, notifying someone that they have been sued in a civil lawsuit happens with a legal procedure known as "service of process." Below is an example of such a motion.