The Hahnemühle Certificate of Authenticity was designed to protect the security of your limited edition artworks and reproductions on Hahnemühle paper; reducing the risk of forgery. Each certificate is made from premium deckle edged, mould-made paper with the Hahnemühle watermark. A serialized, numbered hologram should be added to the certificate; the second should be applied to the artwork. You can register your artwork on www.myartregistry.com for additional security.