So, if I had to go to court and the non-account signer said they didn't receive the e-mail and were not the one to sign it, what would you do to prove they were indeed the signer?
All documents are provided with an audit trail of when the different parties view the document and other relevant info. This method of verification is standard across the different e-signature providers. Feel free to contact me if you have other questions at ed [at] hellosign [dot] com