> Well a simple email would be too easy to forge.

Email is how thousands of SaaS handle cancellations today already.

> But I'm sure its not hard to setup something I "your account" page.

That's the whole point of the subthread...

Email reception, yes. Email sending is different, you would need to check DKIM that the sender is really the one, and that has also some setup cost.

I'm sorry, I don't think your posts have anything to do with my message or with this thread.