Come eliminare la firma in memoria per salvare un'altra
Perché posso usare solo una firma?
But it would help if you describe in more detail how was this PDF signed.
However, if you were using the mobile app to apply an electronic signature with the Fill & Sign tool, I don't see why you can't delete it, edit or add another sigbature to the same document while you're still working on it and before it is saved.
Click on the :heavy_minus_sign: