the pdf file created can be modified

Hello, I have a problem.
when at the end I download the created pdf file, the file can be modified.
how can i make it read only? you can't change it.
attached an example of file generated through form, correctly working, I just need it to be a pdf file only read.

thank you

Hi,

Just set "flatten" option to "yes" on "Settings" panel at E2Pdf Template. (screenshot attached).

We remain at your service.

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