DocuSign is one of the largest electronic document signing companies. I've used it in the past, and it's very convenient - you view the document PDF and then use their web site to electronically sign the document.
And they've been hacked, and their customer database has been compromised. And people are getting emails purporting to be from DocuSign asking for financial information ("Phishing" attacks).
If you've used their service and get one of these emails, go directly to their web site - and call their 800 number - before you do anything. Actually, you probably are best off just deleting any email you get from them asking for personal information.