Gallery & Industry Terms
Certificate of Authenticity (CoA)
Last updated on September 6, 2026
A Certificate of Authenticity (CoA) is a vital physical or digital document that verifies an artwork is genuine and was created by the stated artist. Serving essentially as the artwork's "passport," the CoA accompanies the piece throughout its lifespan. It is a critical component of provenance, safeguarding the artwork's historical integrity and ensuring its financial value remains protected on the secondary art market.
Key Elements of the Document
For a CoA to be credible and legally effective for collectors and auction houses, it must clearly display specific, standardized metadata:
- Artwork Details: The exact title, year of creation, medium, and precise dimensions of the piece.
- Edition Information: If the artwork is a print, photograph, or bronze cast, the specific edition number (e.g., 3/10) and the number of Artist Proofs (APs) must be clearly stated.
- Visual Identification: A clear, high-resolution thumbnail image of the artwork to prevent the certificate from being fraudulently attached to a forgery.
- Statement and Signatures: A formal declaration of authenticity, traditionally signed and dated by the artist themselves, or, if authorized, by the representing gallery or artist's estate.
