Certificate of authenticity for a painting: what it must contain
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A certificate of authenticity is a sheet of paper that accompanies a painting for its entire life. It does not make the work more expensive and adds nothing to its artistic value. But without it, resale, insurance and inheritance run into complications that could have been avoided.
Let us look at what this document is, how it should be composed, and what to watch for.
What it is
A certificate of authenticity is a written confirmation that a particular work was made by a particular author. Legally it is neither proof of ownership nor a valuation. It is the artist's statement of authorship.
What chiefly determines the document's weight is who signed it.
A certificate from a living artist — the strongest version. The painter confirms his own work, and only he can dispute it.
A certificate from a gallery or dealer — weaker. The gallery confirms what it was told or what it established itself, not what it knows at first hand.
An expert opinion — a separate genre. Needed when the author is unavailable or unknown: an art historian examines the work and gives a judgement based on style, materials and technique. It costs money, takes time, and in contested cases different experts can disagree.
This is why buying directly from the artist settles the matter in one move: the document is signed by the same person who held the brush.
What the document must contain
The minimum without which a certificate does not do its job.
Title of the work. Exactly as it appears in the artist's catalogue of works.
Dimensions. In centimetres, height × width. Without the frame — the size of the canvas on its stretcher.
Medium and support. “Oil on canvas”, “oil on board”, “gouache on paper” are different things with different longevity and different prices.
Year of creation. Not the year of sale but the year the work was painted.
Catalogue number. A permanent identifier. In our case these are codes such as К-005 — by which the work can be found on the website and the details verified.
A photograph of the work. Essential. Without an image the certificate is tied to a description, and a description can be made to fit a different painting.
The artist's signature. By hand, not a facsimile.
Date of issue. When the document was drawn up.
What is sometimes added
Not required, but useful.
Name of the first owner. The start of the chain of ownership. Should the work reach the secondary market later, that line begins at a documented point.
Description of particulars. Whether varnished, whether stretched, whether framed.
Storage guidance. A short note: avoid direct sunlight, do not hang above a radiator.
The artist's contact details. So that a future owner can seek confirmation.
The signature on the canvas itself
A certificate is a document that can be lost. A signature on the work cannot.
That is why it is not only paper that gets signed in the studio. The artist's signature is on the front; on the stretcher at the back are the title, the year and the same catalogue number, written by hand.
This gives a double attachment: even if the document disappears, the work can be identified from the canvas and checked against the artist's catalogue.
What it does in practice
Three situations where the document settles everything.
Insurance. To add a painting to a policy, the insurer requires proof of authenticity and value. Without a certificate and invoice the work will either not be accepted or will be valued at the lowest tier.
Resale. A buyer on the secondary market looks first at provenance. A work with a certificate from a living artist and a documented chain of ownership sells faster and for more than a work without papers.
Inheritance. In dividing an estate, a painting without documents is an object of indeterminate value. With documents it is an asset with a defensible valuation.
Customs. For international shipping, original works of art pass under a reduced rate. The declaration requires a description of the work, an invoice and the certificate.
How to keep it
Keep the certificate and the invoice together, but separate from the painting. If the work is stolen or damaged, the documents must survive.
Make digital copies — a photograph or scan — and store them in the cloud. This does not replace the original, but it saves the situation if the paper goes missing.
When the painting passes to a new owner, the documents go with it. They are part of the work, not an accessory to it.
Frequently asked questions
What if the certificate is lost?
If the artist is alive, contact him. Using the catalogue number and a photograph of the work, the document is reissued. This is precisely why the number is repeated on the stretcher: the work can be identified even without the paper.
Can a certificate be forged?
Technically yes, as any document can. That is why it does not work alone but in combination: with the signature on the canvas, the number in the artist's catalogue, and the chain of ownership. Forging all of it at once is considerably harder.
Is an expert opinion needed if there is a certificate from the artist?
No. Expert opinions are needed when the author is unavailable or the authorship is contested. Confirmation from a living artist is the strongest document that exists.
Does the certificate have legal force?
It is not a notarised instrument, but it is accepted by insurers, auction houses and customs authorities as evidence of authenticity. In contested cases a court will weigh it alongside other evidence.
Every work leaving the studio is handed over with a certificate. If you have questions about a particular canvas, or need a copy of the document, write to me.
