You have created a PDF Form Recognition archive document as a reference, but when testing DLP recognition capabilities you are getting inconsistent results
There are multiple possible reasons that a PDF reference-document may be unreliably detected in DLP:
It is not saved in a high enough resolution
Its content is not evenly distributed across the page
The document background is too dark
Electronically fillable fields are not in the AcroForm format
Use a third party site such as Pixel calculator to work out the DPI of your PDF document by entering the resolution from the document's properties window into the pixel values on the calculator site. If necessary recreate your PDF file with a higher resolution and re-archive it.
Always view the whole page before creating the archive to ensure content is evenly distributed
Avoid any shading for backgrounds in Form Recognition documents. Keep it black on white for best results
Ensure your PDF creation tool is set to use AcroForm format if you have any electronically modifiable fields.
For detailed information see the Administrator's Guide section 'Preparing a Form Recognition Gallery Archive'
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