Elias - if you want to place a stamp after a signature, you first need to apply 
a Certifying signature to the PDF (prior to the first user signature) that 
states that annotations are allowed after signing.  Otherwise, the stamps are 
not valid post-signing.  

Of course, you could use actual signatures instead of simple stamps - and those 
would be fine, since you'd be creating new signatures.   (and that's the case 
of the sample you displayed - they are real signatures) But this was done 
BEFORE (or well, as part of).  Your problem is doing it AFTER signing.

Leonard

-----Original Message-----
From: Elias_iText [mailto:[email protected]] 
Sent: Monday, August 27, 2012 8:41 AM
To: [email protected]
Subject: Re: [iText-questions] Set visible signature on multiple/all pages

Michael, good morning.

Really, I want to use the signature field properties to put a stamp on every 
page, without causing any warning or notice in Acrobat Reader when you open the 
document.

Today, when I put a annotation in a file previously signed, Acrobat Reader 
reports that there was an update after the document was signed. I do not want 
that happen.

So I'm looking for an alternative to placing a stamp on every page, telling 
that I read the page and that this stamp or annotation does not cause alerts in 
Acrobat Reader. After that,  I put my signature on the final page.

On the Web, I found a small program that replicates a signature on all pages. 
That program put a annotation on each page and put the same signature reference 
for every annotation.

Look that:
16 0 obj
<</FT/Sig/T(Signature1)/V 9 0 R/F 132/Type/Annot/Subtype/Widget/Rect[50 50
150 100]/AP&lt;&lt;/N 15 0 R>>/P 4 0 R/DR<</XObject&lt;&lt;/FRM 14 0 R>>>>>> 
endobj
7 0 obj
<</Type/Catalog/Pages 3 0 R/AcroForm&lt;&lt;/Fields[16 0 R 16 0 R]/DA(/Helv
0 Tf 0 g )/DR&lt;&lt;/XObject&lt;&lt;/FRM 14 0 R>>/Font<</Helv 17 0 R/ZaDb
18 0 R>>>>/SigFlags 3>>>>
endobj
6 0 obj
<</Parent 3 0 R/Contents 5 0
R/Type/Page/Resources&lt;&lt;/ProcSet[/PDF/Text/ImageB/ImageC/ImageI]/Font&lt;&lt;/F1
1 0 R>>>>/MediaBox[0 0 595 842]/Annots[16 0 R]>> endobj
4 0 obj
<</Parent 3 0 R/Contents 2 0
R/Type/Page/Resources&lt;&lt;/ProcSet[/PDF/Text/ImageB/ImageC/ImageI]/Font&lt;&lt;/F1
1 0 R>>>>/MediaBox[0 0 595 842]/Annots[16 0 R]>> endobj
3 0 obj
<</ITXT(5.0.6)/Type/Pages/Count 2/Kids[4 0 R 6 0 R]>> endobj
8 0 obj
<</Producer(iText® 5.3.0 ©2000-2012 1T3XT BVBA; modified using iTextSharp
5.0.6 \(c\) 1T3XT
BVBA)/ModDate(D:20120824152750-03'00')/CreationDate(D:20120824152406-03'00')>>
endobj

Above,  two pages with one annotation in each page.  The annotations has the
same signature field reference.  This works well.   The Acrobatr not alert
anything, just informs that a signature is valid.

At last object described above(8 0 obj), I believe this has been done by iText.


So I was wondering how to put the same reference of a signature for multiple 
annotations as was done above or one best alternative to put my stamp on each 
page in order that does not cause any alerts in Acrobat Reader.

If you can help me to how to do this using iText, I thank you.

Elias.






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Exclusive live event will cover all the ways today's security and 
threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
_______________________________________________
iText-questions mailing list
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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

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