When clicking a Box Sign link from an email, if the user is not logged into Box in the browser session, the user cannot access saved signatures. A link should be added to the Sign page to allow logging in directly. Currently, the work around is to close the tab, open a new tab, visit app.box.com, sign in, and then re-click the link or navigate to the document. It would save a few clicks to add a sign in link to either the saved signature tab or to the top of the sign page.