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pdf document editor

thanks , do you think the files will appear as original to special software ?

i can edit metadate with various editors including command line tools, but the problem lies in the validity of document after this changes .

the document is either electronically signed and there is no way how to go around and modify it without giving someone a chance to verify it - this is very rarely used nowadays

or there is no signature and you can do whatever you want
 
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Does it have to be PDF, can't it be a image file?
 
Does it have to be PDF, can't it be a image file?
some snuggle us and ask for pdf to be harder to modify files without overwrite the metadata .

jpg/png files are far less complicated and sometimes go without being checked if quality is fine but this relative part , in case they are not compatible unlikely used as proof of originality .
 
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