Hello,
which tool is prefered to determine the signature validity? I have a signed dynamic form with multiple sign fields. When I open it in Adobe Acrobat 9 Pro on Windows 7, it shows me for the first signature of the document, that "Document has been altered or corrupted since it was signed".

When I open the same document on another computer in Adobe Reader 9.5.2 on Windows XP, it tells me that "This revision of the document has not been altered".

Which one of these should I trust?
Best regards,
Tomas Hansut