New York Department of Motor Vehicles Ordered Interlock Device Installation Confirmation is a document issued by the New York Department of Motor Vehicles (DMV) certifying that an ignition interlock device (DID) has been installed in a vehicle by an approved installer. This document is often referred to as and DID installation confirmation. It is used to verify that the DID has been properly installed and is in compliance with the DMV requirements. The document includes the date and location of installation, the DID serial number, and the name of the approved installer. There are two types of New York Department of Motor Vehicles Ordered Interlock Device Installation Confirmations: Installer Confirmation and DMV Confirmation. The Installer Confirmation is issued by the approved installer and the DMV Confirmation is issued by the DMV. Both documents are required to complete the installation process.