Delivering legal papers is called "service of process". The law says that legal papers have to be "served" (delivered) the right way.The deadline for service of answers or objections to interrogatories depends on the method of service of the interrogatories. Intheblanks form required for any matter originating and electronically filed in Supreme or Surrogate's Courts in Richmond County. Interrogatories are a discovery tool (among many) used in lawsuits in New York courts. In sum, these are written questions seeking specific information. This is due largely to the fact that the legislature chose not to amend any of the other 62 provisions in the CPLR that reference an "affidavit. Service of interrogatories. Among the devices is the Information Subpoena, a unique post-judgment discovery device (CPLR 5224(3).