Yo have to be more specific. I've gotten these emails, and they tend to tell you EXACTLY what you need to do. Sometimes, it is just a matter of signing into your account and re-confirming the check box where you confirm that you are the owner. Sometimes it is replying to the email that you are the copyright owner. A couple of times, I needed to send them copies of signed releases I had from other authors...but that was for an anthology that I published.
Just read the email and follow the instructions. You should be fine.
Just read the email and follow the instructions. You should be fine.