Gene51 wrote:
That would be a Certificate of Authenticity.
Most usually create a template in a word processing program, and print it on high quality, heavy paper stock, and use archival PVA glue to attach it to a print, mat, or paper backing on a framed print.
https://www.naina.co/2016/12/certificate-of-authenticity-template/
https://www.framedestination.com/framing-accessories/photo-mounting-supplies/adhesives-glue/lineco-white-ph-neutral-adhesive.html
Thanks "Gene51". I have found a nice linen textured card stock that I will be using. I will use something equivalent to the Lineco product or an acid free adhesive spray to attach.