The New York Index Number Application (Doc File) is a document used by the New York Supreme Court to assign a unique number to a court case in order to track, manage, and store information about the case. This application is typically used by attorneys and law firms to register a case with the court. There are three different types of New York Index Number Applications (Doc Files): Original Index Number Application, Change of Index Number Application, and Consolidated Index Number Application. The Original Index Number Application is used to open a new case in the Supreme Court. The Change of Index Numbers Application is used to change existing case numbers, and the Consolidated Index Number Application is used to combine two or more cases into one. The New York Index Number Application (Doc File) includes information such as the court district in which the case is being filed, the parties involved in the case, the type of relief sought, and a description of the case. This document must be completed in full in order to be accepted by the court.