This article explains how to use Adobe Sign to send a document out for signature. The signatures obtained via this method are secure and validated by a server.
Instructions
Sign in to adobe.com
Click on the menu icon and select Document Cloud
Click on Start under the Request Signatures section
Enter the recipient of the document
Give it a name
Drag & drop the file that you want to send out for signature
Select the location of the signature
Click send to finish the process