I do label all of my work even my little quilts for grandnieces teddy bear quilts. I include.... Made for _____________ by ______________ the date it was finished, (usually month and year) and sometimes the name of the quilt. I always put a little kitty face that is my personal little logo on my label just for fun.
I sew the label into seam of the binding. On little projects and depending on the color of the fabric, I will just write on the quilt itself. Please do label your work, even if you don't think it is worthy of lasting for generations. Those are the quilts that become the history of our families, history of our region and the history of our craft.