I have contacted Nissan multiple times over 5 years to ask them to stop sending mail to my physical address, but they chosen not to.The mail is so frequent, at least once a month, but can be once a week. I've been told to contact individual dealerships - and dealerships have claimed there is nothing they can do. It is ridiculous to buy a product and then as a thank you the company never stops harassing you. I can tell you that kind of behavior ensures I'll never be a Nissan customer again.
