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Hello Natale,

first of all, thank you very much for your quick reply. Perhaps I did
not explain the problem well enough. I did not modify a digitally
signed pdf.
In short, the problem is any writer document containing at least one
text box cannot be properly exported to pdf with a digital signature.

The easiest way to reproduce (with the mentioned Version/Build on
debian 10) is as follows.

1) Open libreoffice writer

2) Insert a text box into the blank sheet containing the text "This is
a text box"

3) Export the document to pdf with digital signature

4) Open the pdf with libreoffice draw

=> Look at libreoffice draw's notice about the signature


-----Original Message-----
From: Natale Tarantino <>
Subject: Re: [libreoffice-users] Problems when digitally signing PDF
exports of *.odt documents containing text boxes
Date: Thu, 19 May 2022 18:39:56 +0200

If you modify a digitally signed pdf this is the correct behavior. 

Il Gio 19 Mag 2022, 17:56 Norbert Berzen <> ha
Hallo together,

I'm using LibreOffice Version:

Build: 8d71d29d553c0f7dcbfa38fbfda25ee34cce99a2

on Debian 10 (Buster).

Before filing an official bug report I would like to know if some of

you does experience a similar problem.

My problem is as follows:

When exporting some simple *.odt document from writer to PDF via

"File->Export As->Export as PDF...", the Dialog "PDF Options" pops

In "Digital Signatures" tab I can digitally sign the PDF with my

certificate. All is fine so far. The PDF gets properly digitally

and I can check this by opening the PDF with "Libre Office Draw". 

But when a text box gets added to the document I can export to PDF as

well. Opening the PDF by "Libre Office Draw" now gives the
followingmessage: "At least one signature has problems: the document
is only partially signed."

Does any of you experience similar problems when exporting documents

containing text boxes or can someone proove my problem?

Many thanks in advance


Norbert Berzen <>

Norbert Berzen <>

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