Certificate of Authenticity: What It Should Actually Contain

What a certificate of authenticity should contain: the ten fields that matter, who should sign it, how print and painting certificates differ, and red flags.

Hold the document that came with your last purchase up to the light. A certificate of authenticity that is worth keeping tells you four things without your having to ask: what the object is, who made it, who is standing behind that statement, and what happens if the statement turns out to be wrong. Most certificates manage the first two. The ones that protect you manage all four, and they do it on a single sheet you can read in under a minute.

This guide walks you through what a certificate of authenticity actually is in law and in trade, the fields a usable one contains, how the document differs for a limited-edition print and for an original painting or an antique, the marks of a certificate that proves nothing, and how to store and transfer the paperwork so that it still carries weight when you come to sell.

What a certificate of authenticity is, and is not

A certificate of authenticity is a signed statement of opinion by an identified party about a specific object. That is the whole of it. It is not a title deed, not a guarantee issued by any authority, and not a substitute for the object's history of ownership.

The distinction matters most when money is involved. A certificate says "we believe this is what we say it is". Provenance says "here is where it has been and who has owned it". The two do different work, and a well-documented chain of ownership is the stronger of the pair for anything old. If you are buying antique material, read the certificate alongside the ownership and export paperwork rather than in place of it.

A certificate also has no independent existence. It is only as good as the party who signed it and the evidence behind their opinion. A signature from a publisher who printed the edition is a statement of fact about their own production. A signature from an unnamed "authentication service" about a fourteenth-century scroll is worth the paper.

The fields a usable certificate contains

Ten items cover nearly every honest case. Anything shorter tends to be decoration.

The object identified beyond substitution. Title, date of the work, medium, image dimensions and sheet or overall dimensions, and where relevant the edition number. A certificate that could be swapped onto a different copy of the same work is doing half its job.
The maker named as the issuer understands them. Full name, life dates where they are known, and the romanisation used, with characters in brackets if the artist is Chinese. Names transliterate several ways and a certificate that says only "Li" will not survive a resale.
The nature of the object stated plainly. Original painting, original print pulled by the artist, posthumous impression, or reproduction. Vagueness here is the single most common defect.
The issuer named and locatable. Trading name, postal address, company or registration number, and a working contact. A party you cannot find cannot be asked anything later.
A signature by a named individual, with their role and the date. A printed facsimile is a design element, not a signature.
A unique reference number tied to that object. It should appear on the certificate, in the issuer's own records, and ideally on the reverse of the mount or on a label.
A photograph of the actual object, not the artwork in general. A small printed image of the piece as it left the issuer settles later arguments about condition and substitution.
The basis of the opinion, in one sentence. Printed by us from the artist's file. Purchased directly from the estate. Examined in person against the reference archive. This line is what separates an opinion from an assertion.
A stated remedy. What the issuer will do if the attribution is overturned: refund of the purchase price, refund with interest, or nothing at all. Many reputable dealers offer a lifetime refund on a successfully challenged attribution. If the certificate is silent, ask in writing and keep the reply with it.
The date of issue. Certificates are opinions at a moment in time, and scholarship moves.

Who signs it, and why that decides its weight

Ranked by what the signature actually secures:

The artist, for a living artist's own work. The strongest form. A photograph of the artist with the work, or a hand-signed and numbered margin, is stronger still.
The estate, foundation or catalogue raisonné committee. For a deceased artist of any consequence this is the document the trade recognises. Some committees issue opinions only, and only for works submitted physically.
The publisher of an edition. Authoritative about its own production: the printing method, the paper, the edition size and the number of the copy in your hands.
The selling dealer or gallery. Useful in proportion to the dealer's standing and their willingness to state a remedy. This is where the refund clause matters most.
An independent scholar or a named specialist. Weight depends entirely on the person, and a serious opinion normally arrives as a signed letter with reasoning, not as a certificate with a border.

Auction houses generally do not issue certificates at all. They warrant the catalogue description for a limited period, usually a few years from the sale, and that warranty, not a certificate, is the document to keep. The same evidentiary habits a specialist uses when examining a painting itself should be visible somewhere in the paperwork.

Certificates for limited-edition prints

Prints are where certificates do their most useful work, because everything the buyer needs to know is a matter of record rather than of connoisseurship. A print certificate should state:

The edition size and this copy's number, in the same form as the pencilled notation in the margin. If the two disagree, stop.
The printing method named accurately. Archival pigment print, giclée, lithograph, woodblock. The difference between a hand-pulled print and a photographic reproduction of a painting is the difference between two markets, and the distinction between reproductions and original works belongs on the certificate in plain words.
Paper and ink by name. Cotton rag paper and pigment inks have a predictable life; dye inks on coated stock do not. The specification is what lets a conservator judge how long the sheet will hold its colour.
The date of printing and the printer.
What happened to the source file or plate once the edition closed, and whether artist's proofs, printer's proofs or a hors commerce group exist outside the numbered run.

If any of that is unfamiliar, the conventions behind numbered editions and the meaning of the fraction in the margin are worth reading before you buy rather than after.

Certificates for original paintings, calligraphy and antiques

Here the certificate is the weakest document in the folder and should be treated as such. For a Chinese painting, the evidence lives in the object: the paper, the mounting, the ink behaviour, the inscription, the seals and the collector marks accumulated over a life. A certificate summarises somebody's reading of those things.

Ask what was examined and how. An opinion formed from photographs is a different animal from one formed with the scroll unrolled on a table. Ask whether the seals were compared against published impressions, because signatures and seal impressions are the first place a copyist's hand shows. And treat any certificate accompanying a twentieth-century master's work with particular care, since that is exactly the material where convincing reproductions circulate with paperwork attached.

For export material there is a further point: a certificate of authenticity is not an export licence, and the two are sometimes conflated by sellers who should know better.

The certificate that proves nothing

No named human being anywhere on it. A company logo and the word "certified" is a graphic, not an opinion.
Security theatre in place of content. Gold foil, an embossed seal and a holographic sticker tell you the certificate is hard to copy. They say nothing about whether its contents are true.
A description of a type rather than an object. No dimensions, no reference number, no photograph.
A remedy that is absent or expires quickly. Thirty days is a returns policy, not a stand behind an attribution.
An issuer with no continuing existence. A dissolved company or a dead trading name cannot answer a question in ten years.
The certificate as the only evidence. If the seller's case rests entirely on a sheet of paper that the seller produced, you are being asked to buy the paper.

Keeping and passing on the document

Store the certificate away from the work, not taped to the backing board, where adhesive and acidic card will reach it. Photograph or scan it on the day it arrives, store the file with the purchase invoice and the seller's correspondence, and keep a copy somewhere that is not the same building as the work.

Record the reference number in your own inventory alongside the invoice number, the price paid and the date. When you sell, the certificate travels with the object, and so does the invoice that shows you bought it from the issuer. A certificate handed over without the supporting trail is half a document, and buyers who know the market will price it that way.

Common questions

Does a certificate of authenticity make a work genuine?

No. It records that a named party believes the work is what they say it is, on a stated date and on stated grounds. If the party is the publisher of an edition describing its own production, that belief is close to fact. If the party is unnamed, the certificate carries no evidential weight at all. The object and its ownership history remain the primary evidence; the certificate is a summary of somebody's reading of them.

Is a certificate of authenticity legally binding?

It can create obligations, but not by itself. What binds a seller is the description in the contract of sale, together with any written remedy they have given, such as a refund if the attribution is successfully challenged. That is why the remedy clause matters more than the certificate's design. Keep the invoice, the certificate and any written exchange together, since it is usually the combination that would be tested if a dispute arose.

What should a certificate for a limited-edition print say?

The edition size and this copy's number, matching the pencil notation in the margin; the printing process named accurately; the paper and inks; the date and place of printing; the publisher's full identity and a signature by a named person; a unique reference number; and what became of the plate or the source file when the edition closed. Anything less makes it difficult to establish, years later, that your sheet belongs to the edition it claims.

Should I worry if an older work has no certificate?

Not in itself. Most genuine antique Chinese material carries no certificate, because the practice is modern and the evidence sits in the object and in the ownership record. A nineteenth-century scroll with a documented chain of owners and old collectors' seals is better documented than the same scroll with a certificate issued last year by a party you cannot trace. Judge the paperwork you are offered by who produced it and what they examined.

Browse the collection

Every print we sell is a limited-edition archival giclée reproduction of a twentieth-century Chinese ink master, hand-numbered and issued with a certificate that names the work, the edition, the paper and inks, and the house standing behind it. If you want to see how that looks in practice, the pieces in our collections each carry one, and the documentation travels with the print when it changes hands.