It's right there when you log into You+Nissan through the Nissan website:
If you're still physically in possession of the car I'd recommend going through all the menus and clearing personal data such as cached address book from your phone, your favourite waypoints and home location (!!) from both the satellite navigation section and also the plug in reminder section in the zero emission settings, unless you want the new owner knowing your home address and phone numbers of all your contacts...
When I bought my Leaf the previous owners home address was still in the satnav, as was their entire phone contact list as their phone had not been deleted.
