A CoF is a legal requirement for all rental vehicles in New Zealand, taking precedence over a Warrant of Fitness.
If your vehicle is over 3500kgs, it should already have one. If your vehicle currently has a Warrant of Fitness (WOF), you will need to get a COF prior to a renter using your vehicle.
You can get a COF from VINZ, or VTNZ.
For further information on COFs, as well as a full list of COF inspection providers, visit the NZTA
www.nzta.govt.nz/vehicles/warrants-and-certificates/certificate-of-fitness/