It all depends how the mistake happened. I didn't have it with points, I had it with statement credits, when a few years ago, when I upgraded at the end of the year my BGR to get the airline credits, all of my additionals (30-40) were upgraded along, when I called to downgrade again I got instantly the AF on the Au's back, then at the end of the month I got them again, ended up with a credit of $6K+! BH neve got clawed back!