Hahnemühle Certificate of Authenticity System
Each certificate is made of premium deckle edged mould made paper with a Hahnemühle watermark and fluorescent security fibres. A serialized numbered hologram should be added. A second, identically numbered hologram should then be applied to the reverse side of the artwork.
The combination of certificate and hologram assures that each Certificate of Authenticity relates to one particular piece of art.