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How do I add a certificate signature to a PDF?

March 12, 2024
2.1K Views

What Is a Certificate Signature?

While an ordinary signature may suffice for everyday documents, when it comes to signing important documents like business contracts or legal agreements, a PDF certificate signature becomes an indispensable tool to ensure document security and legality.

Advantages of PDF Certificate Signing

  • Document Integrity: Certificate signing ensures that the document has not been tampered with, safeguarding the document's integrity. Once a document is signed, any changes will render the signature invalid.

  • Legal Validity: PDF certificate signatures carry the same legal weight as traditional paper signatures, making signed contracts and legal documents legally valid.

  • Authentication: Digital signatures allow for the verification of the signer's identity, ensuring that the signature belongs to a contract participant or legal professional.


Operation Steps:

Let's demonstrate the steps for creating a certificate signature using a formal purchase contract:

  1. Click "Certificate Sign" > "Add Signature."

  2. Enter the required information in the pop-up window, including your name, encryption Key Algorithm, usage, country, company, and department.

  3. Set a password for the certificate signature (remember this password, as you'll need it for identity verification). The certificate signature can only be inserted into the document after successful authentication.

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After setup, you can configure the certificate signing by:

  • Changing the signature style or replacing it with an image or drawing.

  • Adjusting the signature's dimensions.

  • Adding additional elements, timestamps, and reason.

  • Specifying the page range for batch signing multiple pages.


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How Can I Ensure the Validity of My Certificate Signing?

  • Once a certificate signature is applied, you cannot move its position or edit the document. Any modification to the document content will invalidate the certificate signature.

  • Double-clicking the signature allows you to view signature details, showing the signed certificate information, signing time, and the signer's identity.


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How Do I Manage My Certificate Signings?

Click the "Protect" tab > "Manage Certificate Signings."

  • You can import other certificates stored locally on your computer.

  • You can edit, delete, or export created certificates.

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15 years of office industry experience, tech lover and copywriter. Follow me for product reviews, comparisons, and recommendations for new apps and software.