Certify PDF for Contract Authentication
Add a certification signature to verify document authenticity and detect tampering
Why Certify PDF for Contract Authentication?
Certification goes beyond basic digital signatures — it proves the document's origin and detects any modifications after certification. Essential for contracts, legal agreements, and regulated documents where authenticity must be verifiable.
How to Certify PDF for Contract Authentication — Step by Step
Follow the shortest path for this exact task, then jump into the tool when you are ready to compress the file.
- 1
Upload the PDF contract or document
- 2
Add your certification signature
- 3
Set allowed changes (none, form filling, annotations)
- 4
Download the certified PDF
Frequently Asked Questions
What's the difference between signing and certifying?
Can a certified PDF be modified?
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Ready to certify pdf for contract authentication?
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The free plan includes 3 contracts/month. Review the current plan terms before sending.