Dear [CORRESPONDING AUTHOR]:
We understand that you wish to have [NAME] added/removed from the authorship of this paper. Please note that we require written confirmation that all of the original authors agree with this change in authorship, including the author whose name is to be added/removed.
(Refer to your guidelines on authorship. If author(s) are added you will want to ask about their contributions and competing interests.)
After we have received this confirmation we will publish a formal correction to the paper. We look forward to hearing from you by [DATE].