Two factor authentication (with SMS) for client signature

Hi there

Hope you are doing well and sorry for the trouble. As described you want need the functionality to send documents for client signature with two factor authentication (incl SMS).

Please check out the help page https://helpx.adobe.com/sign/using/adobesign-authentication-phone.html which talks about Adobe sign authentication method (Voice and SMS) and see if that helps.

Regards

Amal

Are you requiring the Client to sign with electronic signature, or a certificate-based digital signature?

I think You may be able to do that by adopting a workflow with Adobe Sign.

You may need a Teams Plan or Business Plan, for example, since in the individual plan of Adobe Sign such features are somewhat limited.