Do I need to provide proof of insurance?
Yes, you will need to provide your current NY State Insurance ID card.
What do I need to provide proof of authorization by the leasing company to register my vehicle in NY?
You will need to provide a letter from the leasing company that gives you permission to register the vehicle in NY, a power of attorney from the leasing company that authorizes you to register the vehicle, and the leasing company officer's signature in box 3 on the Vehicle Registration/Title Application.