I recently purchased a bag from them (and am now going through the whole authetication process, comparing, etc.) and the bag seems to be authentic. Blurfly now also has a 'security tag' that they place on the bag so you can't return it once it's removed. I suppose that's one step in trying to deter the swapping routine? I've compared my new bag with all my old ones, and it looks good to me. HTH!