Thanks, rwquilts!
Dragonfly Nana: When you get your email with the registration number, it will include instructions about that. You will put the reg. no. on the back, on the lower right corner. If you use 'freaky fast triangles' in a light color fabric, you can just write on the triangle with a permanent fabric marker -- that's what I do. For the quilt name, your name and your city and state, I usually use the marker to write on a small piece of fabric, then fuse that to the back of the quilt.
Except for the reg. no. in the corner however, you can do as you like with a sewn on or fused on label.
Does that help?