Interrogatories are numbered written questions sent to the other side. Interrogatories are a discovery tool (among many) used in lawsuits in New York courts.In sum, these are written questions seeking specific information. 1. Except as otherwise provided herein, after commencement of an action, any party may serve upon any other party written interrogatories. You need to speak to an attorney ASAP. New York Rules of Civil Procedure - Service of Process Bronx - Supreme Court of the State of New York - Local and Federal Court Rules Made Easy. And often times the information in the interrogatories are vital to resolving the case. Any party may serve interrogatories on any other party at any time after commencement of the action. Hire a process server in Bronx, NY. Upload your case to professional process servers and get the best, local service of process. A: It is normal to to only efile the notice of service of interrogatories and send the actual interrogatories to the relevant party directly.