Here is published the example
filehttps://docs.google.com/file/d/0ByU8H00ILIOKOFZLOU9xVjhGdDg/edit?usp=sharingYou
can download it to your local machine, once you access the file,Include
your signature on User1 signature field and then use the same
certificate to sign the User2 signature fieldThanks for your help!!