thank you so much.
In Italy, there’s a way to file online a judicial procedure to the Court.
You must convert any file in pdf/a.
To convert the file to pdf (from word or from other pdf), no problems are given by the Court’s software if you use the “save as pdf”.
If you convert by PDFCreator (using “print as pdf”) an error appears.
This is the reason why I have asked about possible differences.
Very strange, isn’t it?