There are times when reviewers may no longer have the "review receipt" for a review they've performed but would still like to have the review verified on Publons. We used to offer reviewers the ability to request that the editor of the paper verify the review directly and such a request may have been made we will email you on the reviewers behalf with a link which you can follow to confirm or disavow that the review was performed for your journal.
You can stop receiveing these requests at any time by following the Unsubscribe link in the email we send you. Integrated journals also have the option to verify or disavow reviews directly from their dashboard.
Please note that reviewers are no longer able to make such requests.