As I wrote earlier to someone, put your name on the label, city, date, to whom the quilt was given, pattern name or it was an original idea, and any other pertinent information and quilt the label onto the quilt. It will be harder to remove the label if it is quilted into the body of the quilt rather than just whip-stitched down on all 4 sides. You can quilt just through the batting and backing and your stitches will not show up on top. Most people would not want to take the time to remove all the quilting stitches if they were trying to steal it.