If you see a warning message in your email app (like Microsoft Outlook) saying that a Penneo email has an invalid digital signature or an untrusted certificate, this does not mean there is an issue with your documents, your signing process, or your security.
This message refers strictly to the technical security badge attached to the email itself, not the actual documents you need to sign.
Why am I seeing this warning?
When Penneo sends an automated email, we attach a digital certificate to prove the email genuinely came from us and wasn't intercepted or faked.
Your email app tries to verify this certificate against a pre-approved list of security providers. You see a warning because your specific email setup or company network:
- Does not currently recognize our security provider.
- Cannot connect to the internet to verify the certificate's status at that exact moment.
Good to know: Penneo uses GlobalSign, a globally recognized and trusted certificate authority, to secure all outgoing emails. The email is completely safe to open.
How to resolve it in Microsoft Outlook
Because this is an email app setting rather than a Penneo system error, it usually needs to be adjusted within your email software.
If you or your IT department use Microsoft products and want to stop these security warnings from appearing, you can follow Microsoft's official guide to update your email settings: