Hi @Sheilagh O'Hare,
Thank you for sharing your question.
I am unaware of any setting that would allow you to prevent the email notification from being accessed through a different email address than the one you set for your recipient. We offer options to limit how your signers adopt their signature such as the “Lock Recipient Name” option, or how the manager recipient types will be able to interact with existing recipients in your envelope. Unfortunately neither of these options will work for this scenario. As an alternative, I would suggest looking into implementing an extra Recipient Authentication method such as Phone Authentication or ID Verification, to prevent undesired parties from accessing sensitive documents in your envelopes. For more details on these topics, see:
Signing Options Limits
Recipient modification settings
What kinds of Recipient Authentication are available?
Please don't hesitate to let me know if you have any other questions or concerns and I will address them as soon as possible.
Best regards,
Alejandro R. | Docusign Community Moderator
"Select as Best" below if you find the answer a valid solution to your issue!