Delivering legal papers is called "service of process". The law says that legal papers have to be "served" (delivered) the right way.To find Affidavits of Service go to Forms, visit a Court Help Center or ask the Court for one, most Courts will have this. Any party may serve interrogatories on any other party at any time after commencement of the action. Hire a process server in Bronx County, NY. Upload your case to professional County, process servers and get the best, local service of process. Mobilization for Justice Typically, the Court will grant these. Legal Standard A party must respond to interrogatories within 30 days after service.