Digital Signing and Certifying

PDF Documents created using DynamicPDF can have digital signatures or digital certifications added to the document. Digital signing and digital certifying are both ways to approve the current document with a digital ID (or digital signature). In both signing and certifying the document, applying the digital ID verifies that you (the owner of that digital ID) are personally signing the document.

Any changes to the document after applying a digital signature invalidates the signature. Certifying a document (versus signing it) allows the owner of the digital ID to specify certain changes, if any, that a user can make.

Digitally signing a PDF and digitally certifying a PDF are different actions applied to a PDF; they are not the same thing.

Refer to the following topics for more details.

Digital Signing Explains how to Digitally Sign a PDF Document.
Digital Certifying Explains how to Digitally Certify a PDF Document.
Adding a Timestamp to Signatures and Certificates Explains how to a Timestamp to a Digital Signature or Certificate.

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