You may as well get that info from your friends first... but do NOT talk to him...

You need to send that note after your last time talking to him, if you contact him again and then send it, it will not have the same effect

And you should send the note in email yes, you don't wait til he contacts you to explain it in person... that defeats the point of no contact

It was designed as email...

Be sure you are prepared to follow through...