Signing and certifying documents
You can use the Signature service to sign and certify PDF
documents by using any credential that the service can access. When
signing or certifying, specify the signature field to use.
The following limitations apply to dynamic Adobe PDF forms when
used with the Signature service:
You cannot sign a visible or an invisible signature field.
You can certify invisible signature fields.
You can certify visible signature fields only if the Signature
service is configured to process documents with Acrobat 9 compatibility.
The form can only be viewed using Acrobat or Adobe Reader 9.
Note: For all types of forms, Acrobat or Adobe Reader
users can delete signatures that the Signature service added.
When signing or certifying forms, the following information can
- The credential that contains the private key to use to create
the digital signature.
- Document MDP permissions:
- When certifying, the changes that users can perform on the
document without invalidating the certification.
- Revocation information:
- Whether to embed revocation information in the signature
to use for validating the signer’s certificate. The information
enables OCSP-checking and CRL-checking.
- Time stamp information:
- Whether to create a timestamp for the signature and the information
required to perform the timestamp transaction with the timestamp
- Properties that affect the appearance of the signature when
it is viewed using Acrobat or Adobe Reader. These properties can
be the reason for signing, the contact information of the signer,
a legal attestation, and the icons to use.