Signature and display problems with certain PDF documents

Preface

It can happen that certain PDF documents cannot be signed correctly in Plexflow. This problem is not related to the signature process, but to the structure of the file itself.

Problem

Some files, in particular dynamic PDFs or files generated by specialized software, are poorly interpreted by the Sign module. Result: an error is displayed or the document cannot be validated.

Suggested solutions

Here are two simple methods to correct this problem before uploading the document to Plexflow.

Option 1 – Resave the PDF

• Open the PDF in Adobe Acrobat Reader, Preview (Mac), or any other PDF reader.
• Click File → Save As.
• Give it a new name (e.g. Client-contract_v2.pdf) so as not to overwrite the original.
• Select the standard PDF format (avoid dynamic formats or interactive forms).
• Click Save.
• Import the new file into Plexflow: it will be compatible with the signature.

Option 2 – Use “Print to PDF”

If the first option is not enough, printing to PDF lets you completely flatten the file.

1. Open the PDF document.
2. Click File → Print (shortcut: Ctrl + P on Windows or Cmd + P on Mac).
3. In the list of printers, choose “Print to PDF” or “Save as PDF”.
4. Give it a new name (e.g. Client-contract_printed.pdf).
5. Save the file.
6. Upload this version to Plexflow for signature.

Updated on: 12/11/2026