He enviado un documento a mis clientes para que lo firmen con Acrobat sing. Mis clientes lo han firmado. El documento lo he descargado en mi ordenador y he procedido a insertar una nueva firma con mi certificado digital. Y no es posible.
¿Existe alguna forma de insertar una nueva firma con certificado digital?
Adobe Acrobat Sign by default after collecting and adding the individual signatures forbids changes and enables detection of them by means of encryption and digital signatures with locking. Essentially thereafter to change the PDF (in particular to add another signature) you have to break that digital signature and ignore the permissions set during encryption. If I recall correctly users of enterprise Acrobat Sign accounts can change this behavior in signing workflows they initiate.
Apparently your AutoSign application determines the encryption (and asks you for an owner password) but ignores that the document is locked.
In essence, combining default Adobe Acrobat Sign signing with local signing will not work as desired.
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