When I print out a quilt label on Printed Treasures, I add the care instruction to that. For the quilts with wool batting, I also add that the quilt will smell like a sheep when wet, but will dry odorless. For my customer's quilt where I don't do the labels, I have been putting the care instructions on the invoice so that they will have the information for the quilt.
I also just had a customer ask me to make labels that have "Quilted by" information on it so she wouldn't have to try to remember how to spell my name, LOL!!!