How to Verify Signatures Online
Step-by-step instructions to verify digital signatures in a pdf with ZiaSign.
Why this workflow matters
ZiaSign's signature verification tool checks the validity of digital signatures in your PDF documents. It validates the signing certificate, checks document integrity, and verifies timestamps. See at a glance whether a document has been tampered with after signing.
Step by step
Verify Signatures is one of the fastest ways to verify digital signatures in a pdf. Free Account access gives you the full workflow.
- 1
Upload the signed PDF
- 2
Signatures are verified automatically
- 3
View verification results
Frequently asked questions
What does signature verification check?
Certificate validity, signing authority, document integrity (whether the PDF was modified after signing), and timestamp verification.
Can I verify self-signed certificates?
Yes. Self-signed certificates are verified but flagged as not issued by a trusted Certificate Authority.
What if the document was modified after signing?
The tool clearly reports whether content was altered after the signature was applied — indicating the signature may be invalid.
Can I verify multiple signatures in one document?
Yes. All digital signatures in the PDF are verified individually, each with its own status report.
More specific workflows for this tool
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Read guideReady to run the actual workflow?
You have the steps. Open the tool, process the file, and then move into the next recommendation if the document still needs cleanup, protection, or conversion.