Ask who can authenticate a painting and the honest answer, for a great many artists, is: nobody with the authority to make it stick. That is a relatively recent development, and it is the single most useful thing a buyer can understand about the current market.
For decades the final word belonged to artist authentication boards — committees run by estates and foundations issuing binding opinions. Most of the major ones have closed. They were sued out of existence, and the consequences are still working through the market. Authentication sits alongside provenance as the second half of due diligence, and it has become the harder half.
Why the Boards Closed
The mechanism is worth stating plainly because it explains everything downstream. A board examines a work and declines to authenticate it. The owner, whose asset has just gone from valuable to unsaleable, sues — for defamation, for disparagement, in at least one case on antitrust grounds.
The board may well win. But the cost of winning runs into millions in legal fees, and it recurs every time an owner is disappointed. The Andy Warhol Foundation disbanded its authentication board following a 2007 lawsuit over its refusal to authenticate a silkscreen. Others followed the same logic to the same conclusion.
The incentive structure is asymmetric and unfixable by goodwill: a board earns nothing from being right and is exposed to unlimited cost for being unwelcome. As one Paris-based art historian preparing a Modigliani catalogue put it, liability claims against experts and connoisseurs have become routine.
There has been some judicial relief lately. New York courts have twice dismissed complaints brought against the Agnes Martin Catalogue Raisonné committee by a London dealer, which offers a measure of comfort to authenticators facing retaliatory litigation. But the chilling effect is done, and it is why the College Art Association now recommends that art historians rendering an opinion should generally not charge a fee for it — a startling piece of guidance that exists purely to reduce litigation exposure.
Who Actually Holds Authority Now
The critical qualification, and it applies to every line: the person giving the opinion must have no financial interest in the work. Proposed New York legislation defining protected authenticators drew exactly that line — expertise in the artist or in uncovering the underlying facts, minus any stake in the outcome beyond the fee for the service itself.
The Three Methods, and What Each Can Do
Connoisseurship. A specialist compares style, technique, handling and signature against securely attributed works. It remains the primary method for most attributions, and it is a judgement rather than a measurement — which is precisely why it generates litigation.
Provenance. A documented chain back toward the studio is frequently the strongest evidence available. This is where authentication and provenance research become the same exercise rather than two.
Science. X-radiography, infrared reflectography, pigment analysis and radiocarbon dating establish whether materials and construction are period-appropriate. Note the asymmetry carefully: science is superb at disproving — the Knoedler forgeries were exposed by pigments that did not exist when the paintings were supposedly made — but it can rarely prove whose hand held the brush. A period-correct canvas painted by a skilled forger remains period-correct.
The three work together. No single one settles a contested attribution alone.
The Case That Made Everyone Nervous
In 2016 the artist Peter Doig was sued for denying he had painted a work attributed to him. The plaintiff argued Doig had made it as a teenager; Doig maintained he had never seen it. He prevailed at trial, in what most observers regarded as the strangest art case in years.
Consider what it establishes. A living artist can be taken to court for declining to authenticate a work bearing their name. If that is the exposure faced by the one person who indisputably knows, the reluctance of foundations, scholars and committees to venture opinions is not timidity. It is a rational response.
What This Means for You
Establish who the authority is before you buy, not after. For a deceased artist: is there a catalogue raisonné, and is it open to submissions? Does the foundation still issue opinions, or has it stopped? For a living artist: will they or their primary gallery confirm?
If the answer is that no authority currently operates for that artist, you are buying into a market where attribution cannot be settled — and you should price accordingly, because the next buyer will face the same problem.
Where a board does exist, most conduct an initial review from photographs before requiring physical examination. Send high-quality images of front, reverse, signature detail and support texture, together with your provenance file. Costs vary widely by method and artist.
And treat a certificate of authenticity for what it is: a document whose value equals the standing of whoever signed it, and nothing more. A certificate issued by the seller is not evidence.
Frequently Asked Questions
Who can authenticate a painting?
Depending on the artist: a catalogue raisonné committee, the estate or foundation, the living artist, a published specialist scholar, or an auction house department. The essential condition is that the person has no financial interest in the work.
Why did artist authentication boards close?
Litigation. Owners of rejected works sued for defamation, disparagement and in one instance antitrust. The Warhol Foundation disbanded its board after a 2007 lawsuit, and others followed rather than carry unlimited legal exposure.
Can science prove a painting is authentic?
Rarely on its own. Scientific analysis is decisive at disproving — anachronistic pigments exposed the Knoedler forgeries — but period-correct materials do not establish who painted the work.
Is inclusion in a catalogue raisonné proof of authenticity?
It is the practical market test. Included works trade at full value at major houses; excluded or absent works frequently cannot trade there at all.
What if no authority exists for the artist?
Then attribution cannot be settled, and that risk should be reflected in the price — because any future buyer will encounter the same obstacle.
Part of our series on provenance and authentication. See also: verifying provenance, nine red flags, and reading a condition report.
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