I do now. I did not when I first started out in 1992. I so wish that I had. There are more that do have labels than not, but I think about the others sometimes. Years from now, no one will know who made them.
I cut pieces of a certain fabric. It is off white with a little tan scroll print. They are 6 x 8 inches before sewing. I write the information on them and press to set the ink.