The Response From Amazon Support:
I'm sorry you received an e-mail notification indicating you were required to return the order XXXXX you shouldn't have received that e-mail notification. I've fixed this error, and we won't be charging you again for the item.
We look forward to seeing you again soon.
Original Message:
This is a reminder to return the items below. We’ve issued your refund in advance, but still expect to receive the return. Send the items back by XX to avoid being charged again. Please click ‘View return and refund status’ to access your return label.