Nissan Netherlands provided for free on provide proof of ownership of vehicle. Day later I found original code card. Since those old radios are not worth stealing, write code somewhere easy. I know that an upgrade to a modern radio is 150-300 euros. But the old cluncker not even MP3 capable and bad sound won't sell in a pubI did as asked regarding proof of ownership, driving licence, and pic of the head unit with 'locked' message.Within a couple of days I got an email saying I needed to ring a number to get the code. All for free! And it worked! Great result. However, I prefer my TomTom sat nav, except it is constantly losing the signal. And the Connect system doesn't show your road speed!