Interrogatories are a discovery tool (among many) used in lawsuits in New York courts. In sum, these are written questions seeking specific information.In many civil actions, before the case is resolved there takes place a process known as pretrial discovery. This summary describes the process. Interrogatories are written questions to the other party or parties in a lawsuit whose purpose is to get information that can be used at trial. In cases not subject to Uniform Interrogatory requirements, interrogatories must be answered sixty (60) days after being served. After service has been done, the person who served the papers must fill out an affidavit of service. The service of any additional interrogatories will be permitted only upon motion pursuant to R. -2 and a showing of good cause. 5. Any party may serve written interrogatories on any other party. (e) Motions to Strike.