Amazon has just sent me a (no doubt automated) email asking me to confirm my publishing rights on one of my books, probably because it’s also in a boxed set.

I’m at a bit of a loss how to do this. I’m both the author and the publisher, so I have no contract. I didn’t register the copyright, because it seemed unnecessary. And the email address on my website is an alias; people can send to it, but I can’t send from it. Those are the three examples they give of documentation that can confirm your rights.

Has anyone else had a similar email? What did you do?