[DE] Document ID missing

Description

The Document ID in a PDF document is required by some PDF/X standards.

This Preflight message indicates that the document ID is missing in the PDF file. The document ID is a unique identifier stored in the PDF’s trailer dictionary, usually consisting of two parts: an original ID and a current ID, which can track changes to the document.

The document ID is particularly important for:

• Version control: Helps identify changes to the file.

• Integrity checks: Essential in workflows where file consistency matters, such as digital signatures or long-term archiving.

• PDF/A and PDF/X compliance: These standards often require a document ID to meet archiving or printing specifications.

If the document ID is missing, it can cause issues with PDF standard validation or hinder document traceability.

Common Causes

• Faulty PDF creation: The PDF was generated using software that does not create a document ID, especially simple export or print-to-PDF tools.

• Manual removal of the ID: Editing the PDF structure (e.g., via scripts or PDF editors) may accidentally delete the document ID.

• Corrupted file headers: Damage in the PDF structure can cause the trailer containing the ID to be missing or incomplete.

• Automated workflows without metadata handling: Some workflows may not account for generating a document ID.

• Faulty optimization or compression: PDF optimization tools may inadvertently remove the document ID while cleaning up redundant data.

Suggested Solutions

• Automatic correction in Adobe Acrobat Pro: Open the PDF in Acrobat Pro. Go to Tools > Print Production > Preflight. Select a PDF/A or PDF/X validation profile. Run the Preflight check. If the error is detected, click “Fix” – Acrobat will automatically add a new document ID. Save the file.

• Re-export from the original source: If possible, export the original document again (e.g., from InDesign, Word) and enable the option to automatically generate document IDs.