I've never understood how DocuSign mitigates the risk any more than both parties signing a PDF in Preview (or similar) and exchanging via email. Doesn't the email part validate that you are the person signing the document?
I think that's a valid point - and actually in their terms of services say that they are not responsible for the signer authenticity.
Here is a summary from their TOS:
"DocuSign provides tools and features that help to establish the authenticity of a signer, such as email verification, access code, SMS verification, phone verification, and knowledge-based authentication. However, it's important to note that while these tools can enhance the security and authenticity of the signing process, DocuSign itself does not guarantee the authenticity of the signers. The responsibility of ensuring the identity of the other party lies with the user"
