Delivering legal papers is called "service of process". The law says that legal papers have to be "served" (delivered) the right way.The New York rules do not specify requirements for formatting Interrogatories, but the general formatting rules for papers apply. Additional Format Requirements. 1. Except as otherwise provided herein, after commencement of an action, any party may serve upon any other party written interrogatories. Ct., Bronx County 2000). (a) Interrogatories are limited to 25 in number, including subparts, unless another limit is specified in the preliminary conference order. Civil litigation occurs in the civil law courts. Commercial litigation involves business disputes. Among the devices is the Information Subpoena, a unique post-judgment discovery device (CPLR 5224(3).