What a Certificate of Authenticity Actually Guarantees
What it guarantees, what it does not, and the questions every collector should ask before buying an original.
7/24/20263 min read
Every original painting I sell ships with a signed certificate of authenticity. Buyers ask me what it is for, and the honest answer is more limited than most people assume, so it is worth explaining properly.
What it is
A certificate of authenticity for art is a document, signed by the artist, stating that a specific work is what it claims to be. Mine record the title, the year, the dimensions, the medium, and the fact that the work is a unique original rather than one of an edition. I sign the front of every painting as well, but a signature on canvas can be forged and a signature on canvas does not tell you the dimensions or the year.
What it actually guarantees
It guarantees that I, the artist, assert this work is mine and that the details recorded are accurate. That is the whole of it. Its value comes from the fact that I am alive, findable, and reachable at info@youssufi.com. If a question about a work arises, I can be asked.
That sounds thin until you consider the alternative. Most disputes about artwork are not dramatic forgery cases. They are ordinary confusions: a work resold twenty years later with the wrong year attached, a painting whose dimensions were recorded incorrectly by a previous owner, a piece described as an original that turns out to be a print. A certificate signed at the point of sale prevents almost all of these, because it fixes the facts at the moment when everyone involved still knows them.
What it does not guarantee
It is not an appraisal. It says nothing about what the work is worth, now or later. Anyone who hands you a certificate that includes a valuation is doing something outside the purpose of the document, and you should ask why.
It is not insurance. It is not a legal title. It does not prove you own the work, only that the work is genuine. Ownership is established by your receipt and the chain of transactions after it.
It also cannot be verified independently in the way a third-party authentication can. It is my word, documented. For a living artist selling directly, that is the appropriate instrument. For work by a dead artist, or work with a long resale history, you want proper provenance research and ideally third-party authentication, which is a different and much more expensive process.
Questions worth asking before you buy any original
Ask whether the work is genuinely unique or one of an edition. The word original gets used loosely, and a signed limited-edition print is not the same object as a one-of-a-kind painting, even though both are legitimately collectible.
Ask what the certificate records. If it does not include dimensions, year, and medium, it is not doing much work.
Ask about condition and framing. Whether a canvas is stretched, framed, or shipped rolled affects both what arrives and what you will spend afterward.
Ask how it ships. Large canvases need crating and insurance, and this is where costs surprise people. Anything of mine over 100 cm in either dimension is crated and fully insured as standard, but you should always ask rather than assume.
Ask who to contact later. Ten years from now, if you want to sell or insure or lend the work, you will need someone who can confirm what it is. If the answer is a gallery that may not exist by then, that is worth knowing.
Keep the certificate with the work
This sounds obvious and it is the single most common failure. Certificates get filed separately, then lost during a move, then the work sells at a fraction of what it should because nothing documents it. Tape it to the back of the frame or the stretcher in a sleeve, or scan it and keep both.
Why I do this personally
Some artists have galleries or studios issue certificates. I sign each one myself because the value of the document is entirely in the fact that a named person is standing behind it. Delegating that would hollow it out.
It also forces me to keep a proper record of my own work, which artists are famously terrible at. Every original I have sold is documented on my side as well. If you own a painting of mine and lose the certificate, write to me. I can reissue it, because I know exactly what I made and when.
That, more than the paper, is the actual guarantee.
