Which product are you using?
PDF.js Express Plus
PDF.js Express Version
Detailed description of issue
We do use Universign to sign PDF documents.
Once a document is signed, the Universign signature is not displayed and replaced by a “SIGN HERE” white on blue box.
When user downloads the PDF file, signature is correctly displayed with Universign’s logo in place of the bluebox.
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Does your issue happen with every document, or just one?
Link to document
Not possible due to access rights limitations.
But here is a sample PDF file which behaves the way I explained:
Cannot upload document, limited to one embeded media!