No changes can be made to a signed document. There is no way of unlocking a document without making your digital signature invalid.
Edit a signed document
Once a document has been marked as signed, any further modifications are no longer possible. To revise a signed document, there's no need to start from scratch. Simply create a copy of the document.
- Open the signed document > Click on the action menu > Copy.
- Enter a new document name (Optional)
- Make your changes > Click on Save Changes > Send.
The document will then need new signatures.
Why is a new signature necessary?
Even if you consider it to be essentially the same document as before, any alterations to its content result in a completely new document that necessitates a fresh signature.
What should I do with the previous document?
You have a few options: you can either delete it entirely, connect it to the new document, or add a comment to the old document that includes a link to the new one.