The hearing is tomorrow and the partner asked me to vet and certify outgoing exhibits for evidentiary integrity. I hav…
Open the PDF document you want to certify in Adobe Acrobat.
Go to the Tools pane and select Protect.
In the Protect toolbar, click Certify with Visible Signature or Certify with Invisible Signature depending on your preference.
Drag to draw the signature field on the page if prompted for a visible signature, or confirm placement for an invisible signature.
In the dialog that appears, select your digital ID from the list or add a new one if necessary.
Set the Permissions options to control what changes are allowed after certifying (e.g., no changes, form fill-in only, or comments only).
Optionally, enter a reason for certifying the document.
Click Sign to apply the certifying signature.
Save the PDF when prompted to complete the certification process.
Best practiceIf you need to allow others to fill forms or add comments after certification, choose the appropriate restriction option before signing.
After certifying a PDF, Acrobat will display a blue ribbon in the document’s toolbar to indicate the document is certified and show any allowed changes.
This runs in the Acrobat app - there is no separate API for this task.
A regular digital signature can be applied at any point and multiple times to a PDF, often by different people. Certifying a PDF is a special type of signature that can only be the *first* signature on a document. It locks the document, indicating that its content is approved and should not be changed after certification. This makes it ideal for official documents that need to maintain their integrity from the start.
It is important because certifying a PDF is meant to be the initial seal of approval for the document's content. If other signatures were already present, it would be unclear if the certification applies to the original content or to content that has already been modified or approved by others. The 'Certify' feature is designed to establish the document's authenticity from its first official signing.
A Digital ID is your unique electronic identity, containing a private key and a public certificate. You need one to certify a document because it acts like your personal stamp, proving that *you* are the one who certified the document. The private key creates the signature, and the public certificate allows others to verify that the signature is truly yours and that the document has not been altered.
The 'Certify PDF' feature in Acrobat is for a person's digital ID. If your organization needs to apply its official seal, which is distinct from a person's e-signature, you would typically use the Adobe PDF Electronic Seal API. This API allows for applying organizational seals (like Simple, Advanced, or Qualified seals) that are eIDAS-compliant, using third-party certificate credentials and a seal image.