I'll try to explain better my situation. About Michael doc: I never used certification signature but only approval signature. So I never set any level to prevent modification.
About Leonard reply: the problem is that, even if I used a new revision, Acrobat complains that the first signature is not valid. And this happens only if I sign a signed pdf trying to modify something in it. If I sign a signed pdf without any change this problem doesn't occur. So I desume that revision, for approval signatures, doesn't allow to modify a signed pdf. If you have a signed pdf you can only re-sign it without changes despite of revision. Right? -- View this message in context: http://itext-general.2136553.n4.nabble.com/New-revision-issues-tp4658282p4658290.html Sent from the iText - General mailing list archive at Nabble.com. ------------------------------------------------------------------------------ AlienVault Unified Security Management (USM) platform delivers complete security visibility with the essential security capabilities. Easily and efficiently configure, manage, and operate all of your security controls from a single console and one unified framework. Download a free trial. http://p.sf.net/sfu/alienvault_d2d _______________________________________________ iText-questions mailing list iText-questions@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/itext-questions iText(R) is a registered trademark of 1T3XT BVBA. Many questions posted to this list can (and will) be answered with a reference to the iText book: http://www.itextpdf.com/book/ Please check the keywords list before you ask for examples: http://itextpdf.com/themes/keywords.php
