how to add blank page in digitally signed pdf using java?

Question

I want to insert blank page at end of the digitally PDF using itext library.and my confusion is adding pages will invalidate the existing signatures? Thank you.

Answer 1

Yes it will. The signature is based on the content that is signed, so if you change the content, the signature is no longer valid.

If you're the signer, you can just sign the document again.

Whether the pages you add are blank is irrelevant.