I sew my binding on front, then fold over to back. Then I hand stitch binding on back going back and forth through the mitered corners, so that the mitered corners are stitched down front and back. I do it in such a way it does not show. Hope this makes sense? This method was taught to me by a professional quilt judge who I hosted in my home during our guilds quilt show. I was very happy to get such a great tip.