Years ago I was involved in a quilt documentation project in my county. We were always thrilled when there was a label on writing on the quilts. The information provided was priceless. Since I belong to two guilds I have gotten in the habit of putting a label on the back of at least my bed size quilts. I now own two embroidery machines but before I make a label on one of them I actually use permanent markers to write on the back of the quilt if the fabric is light enough to be able to see. I figure if I mess up then I can sew a label over top of the mistake. It also means that if someone were to steal the quilt they would have to cut the labeled part out.