Universal Proof of Preflight

Universal Proof of Preflight

In response to frequent requests for embedding a “preflight
audit trail” that can be cross vendor, this specification describes a suggested approach.

A preflight
audit trail is information about a preflight check that has been carried out
for the PDF at hand, and contains information about the preflight profile used
as well as what the outcome of the preflight check was. In addition, the user can verify that the file has not been altered since the preflight was executed through the use of a digital signature.

Download Universal Proof of Preflight Specification V1.0 (English version)

Download Universal Proof of Preflight Specification V1.0 (Spanish version)


The GWG does not normally do research into conflicting IP while creating their specifications and best practice recommendations. However, in this case one of our members alerted us to a ‘potential conflict’. They have informed us of their current position regarding this in this document

Further information on the disposition of this IP application can be found at:

The application number is: 10/041525


Since the release, Enfocus has notified the GWG and the industry as a whole of their determination to open up their Certified PDF specifications to all. The details of this notice can be found in the following link:

Certified PDF Specification:

The following link will take you to the Certified PDF Specification: