Fake emails advising that you have a document available for signature are floating around. They have a subject of "Your document Receipt ##### for {email prefix) is ready for signature!" and have a link to REVIEW DOCUMENT which in one case at least links to a Canadian website, probably hacked and containing software that will infect your computer by your simply visiting it! As with all of these fake emails, never click on a link in an email you are not expecting and simply delete them unanswered.