@Gizmo I would definitely ask the Signer/Recipient to provide the Envelope ID when opening the notification to take action on that specific envelope. I get this issue regularly but the majority of the time it was an accidental envelope or an original that was then copied due to an error leaving around an orphaned envelope that continues to send notifications. Once you have the Envelope ID you can verify the envelope is completed. If not completed then you can void or take other actions to stop the reminders. If you find that the Envelope ID is a completed envelope and the notifications continue, I suggest creating a DocuSign case with the Envelope ID and issue for the Support team to investigate.