The client expects a certified 'record drawings' package in two weeks but our redlines, consultant revisions, and cont…
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 certificate signature, also known as certifying a PDF, is a special type of digital signature. It can only be the first signature on a document. When you certify a PDF, it locks the document, making it clear that any changes after certification would break the signature. A regular digital signature can be added to a document that already has other signatures and does not prevent further changes in the same way.
Certifying a PDF is important because it provides a high level of trust and security. It proves the document's origin and ensures that the content has not been changed since it was certified. This is crucial for official records, legal documents, or any information where integrity and authenticity are vital.
A Digital ID is your personal electronic identity, made of a private key and a public certificate. You need it to certify a PDF because the private key creates your unique digital signature. This signature acts as proof that you are the one who certified the document, and the public key allows others to verify your signature's authenticity.
No, you cannot certify a PDF if it already has other signatures. The 'certify' option in Acrobat is only available for documents that have no prior signatures. You must start with a clean document to apply a certificate signature.