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Does digital signature is violated when two pdfs are joined ?

3 posts · originally from https://geek.digit.in/community/threads/does-digital-signature-is-violated-when-two-pdfs-are-joined.174963/

C
cosx Original post #1
Jun 18, 2013 at 2:51 PM
I have two pdf files (form 16 - part a and part b) which was given to me by company. If I join them by any means, will that violate the digital signature (same in the two files) ?
Please help.
harshilsharma63
Jun 18, 2013 at 3:49 PM
Create a copy of both the files, merge the copies, check if the signature still exists.
W
Jun 18, 2013 at 5:05 PM
it should.digital signature is assigned to a file & if you are modifying the content of that file by adding/removing then digital signature will fail to identify the file as the original one to which it was assigned.