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How to Fix Recoverable Signature Certificate Verification Errors in Office
Question details
The user needs to resolve an error indicating that a signer's digital certificate cannot be verified when opening a signed document.
- Product
- Microsoft Office
- Device & OS
- not provided
- Scenario
- Opening a digitally signed document and reviewing the signature details.
- Observed behavior
- An error message appears stating that the signer's certificate cannot be verified, often caused by expired certificates, missing trust chains, or offline validation failures.
Ensure your device is connected to the internet, as online validation is often required to check the certificate revocation status and verify the complete trust chain.
Verify Signature Details and Update Trusted Identities
Review the specific details of the digital signature to identify the error and manually trust the certificate if you recognize and verify the signer.
A recoverable signature error typically means the certificate is valid but currently lacks system trust or a valid timestamp. Adding the signer to your trusted identities resolves this for future documents.
Open the document, click on the 'Signatures' pane or the signature warning message, right-click the signature with the error, and select 'Signature Details'.
Click 'View Certificate' to check the validity dates, trust chain information, and the revocation status.
If the certificate is valid and from a known source, click the option to 'Trust' or 'Add to Trusted Identities' to clear the verification error.
Import the Certificate to the Trusted People Store
Importing the signer's certificate directly into the Windows Trusted People store can resolve system-wide trust chain issues for digital signatures.
Repair Your Microsoft Office Installation
If signature verification features are failing due to underlying software corruption or missing components, running the built-in Office repair tool can fix the problem.
Experience Seamless Document Security with WPS Office
If Microsoft Office continues to experience complex signature certificate verification errors, consider switching to WPS Office. It provides a highly compatible, lightweight, and reliable environment for opening, editing, and securing your important documents without the heavy system overhead.
- 1. Visit the Official Website: Go to the official WPS Office website to access the latest version.
- 2. Download the Installer: Click the 'Free Download' button to download the lightweight setup file.
- 3. Install and Launch: Run the installer, complete the quick setup, and immediately open your documents with superior compatibility.
Frequently Asked Questions
Why does my document say the signer's certificate cannot be verified?
This warning usually appears if the digital certificate has expired, is missing essential trust-chain information, was issued by an untrusted Certificate Authority (CA), or if your device is currently offline and cannot validate the certificate's revocation status.
What is a trust chain in digital signatures?
A trust chain is a hierarchy of digital certificates connecting an individual's certificate back to a trusted root Certificate Authority. If any link in this chain is missing, expired, or untrusted by your system, the signature cannot be fully verified.
Can I verify a digital signature while offline?
Generally, no. Most modern digital signatures require an active internet connection to check the Certificate Revocation List (CRL) online, ensuring the certificate has not been revoked by the issuer since it was signed.
