To be eligible to receive a Scroll, your friend must have previously subscribed to World of Warcraft for at least 30 days, and your friend's account must have been inactive since March 4, 2012 or earlier. You can send a maximum of two Scrolls of Resurrection per day (one from within game, and one from within Battle.net), so choose your recipients carefully. Aside from this daily limit, there is no limit to the total number of Scrolls you can send, but all Scroll invitations expire if not claimed within 30 days.
you probably won't. don't go back!