You can always type up a short description of the stitcher to glue to the back of the frame. I print it on acid-free paper. I like to state who taught me to stitch, how ling I have been stitching counted cross stitch (since 1952), and what I enjoy stitching. I also had my career and whybI stitched the project (especially if it is a gift, it is nice for the recipient to know why you chose the design).
I found that it ius usually just a few sentences. I add a small area to the back with the name of the design, designer (if available), the name of the company, my name, the completion date. Not that anyone will care 100 years from now. It looks like this:
"Giving Thanks"
Designed by Diane Williams
Little House Needleworks
Stitched by Suzanne Pitt
Completed 04/15/2015