I don't think it will be permanent but at the same time they have not stated a timeframe in which it will go away after you get it. There's the /returnerstatusoff command you can use to get rid of it if you don't want it anymore but no information about duration. It's actually likely that it has the same sort of timer as the New Adventurer status since it's basically the same thing with a slightly different look, so perhaps 168 hours/7 days of play after returning?