Actually you can make a reservation online before visiting the DMV office in NY City, West Chester, Nassau, Suffolk, Rockland, Onondaga, Monroe or Albany Counties and this will get you right in.
What happens when I do not want to transfer the registration?
It is actually simple, you just have to surrender the vehicle plates to the DMV and you might get a refund if you surrender the plates before they expire.
What if I do not have the proof the DMV needs?