SigningHub enables you to add a unique identifier to documents for identification that will link the document with the Workflow Evidence Report. So even if the documents leave SigningHub it will be possible to link them to a Workflow Evidence Report. So far the only link is the hash of the document, which is very difficult for a user to link the document with a report.

This field is associated with a specific document and becomes the part of a PDF document when it is shared, signed, reviewed, or updated.

Adding a unique identifier is subject to your enterprise default settings. If you wish to use this feature, ask your Enterprise Admin to enable an option in your Enterprise Settings > Advanced > Default Settings > Document Settings section.

SigningHub embeds annotations, and other necessary content within a PDF file to make your documents fully compliant with the PDF/A-1a and PDF/A-1b standards. This content embedding is required by ISO 19005-1, and is usually associated with a document's visual appearance. 


Add Unique Identifier Field

After you have:



Select the document from the left side of the document viewer screen, a unique identifier will be shown as added on the document header while uploading. A unique identifier will remain the same for all the documents in a  package of a workflow.
  • Unique Identifier will not be added if the document is already certified signed with the No Changes or Form filling and signing  
  • Unique Identifier will not be added if the "Add a unique identifier in the document header on uploading a document" option is not enabled in your Enterprise Settings > Advanced > Default Settings > Document Settings section


Update Unique Identifier Field

  • This field could be dragged & drop on the same page, from one page to another page of same the document, from one document to another document like other fields.
  • One document could not have more than one Unique Identifier.
  • When Unique Identifier field drag & drop from one document to another document, the target document should not already certify signed with the No Changes or Form filling and signing


Delete Unique Identifier Field

Take the cursor to the unique identifier field in the document to delete, and click  appearing on it. 
The unique identifier field will be removed from the document.
  • Once the unique identifier field is deleted, you will not be able to add it again. This field is added by the system when a PDF document is uploaded.
  • Unique Identifier field is not available in Template.
  • The system allowed only a single unique identifier per document.
  • Unique Identifier field becomes the part of PDF document when it is shared, signed, reviewed, or updated


See Also