On 11/8/25 13:23, Jean-Pierre Delange via ntg-context wrote:
> Hi Pablo,
> 
> I'm afraid that the result in Acrobat Reader (Windows 11) is not what 
> you expected. Acrobat displays both panels correctly, but asks for a 
> signature (see attached screenshot). Does this answer your question?

Hi Jean-Pierre,

this is exactly what (I’m afraid) I was expecting. “Okular” display
(previously wrong): https://pdf.ousia.tk/sign-two.png.

In short, the signature fields are perfectly fine (checked with
https://arlington.verapdf.org/ [local,
https://software.verapdf.org/develop/arlington/]).

Unless “Acrobat” is used to sign, `poppler` (“MuPDF-GL” and even
«AutoFirma» [signing software by the Spanish administration]) link the
signature value wrong, causing the wrong display in “Acrobat”.

The result is contrary to the specification, but “Okular”, “MuPDF-GL”
and even the experimental viewer in “Edge” (enabled with `edge://flags`)
display it fine.

I reported an issue in `poppler`
(https://gitlab.freedesktop.org/poppler/poppler/-/issues/1640), but it
hasn’t been reviewed yet.

Many thanks for your help,

Pablo
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