i used to make embroidered labels for people on this board and the way I suggested to them was: I always put wonder-under on the back of the label, then you pressed about 1/4" under all the way around, removed the wonder-under backing paper and ironed the label on the quilt. Then you hand stitch all around the label. You can use a hidden running stitch, blacket stitch or whatever, just make sure you don't go through to the top of your quilt with your hand stitching. Really doesn't take very long and your label is very secure. Hugs