Certificates of Authenticity: What They Say and Why They Matter

Most buyers never ask for paperwork, because a certificate sounds like an auction house thing. Yet the moment it earns its keep is not the purchase. It is five years later, when you insure the work, when you sell it, or when a family argues about who made the painting on the landing. Below is what the document is, what belongs in it, and what to ask as a buyer.

What a certificate of authenticity is#

A certificate of authenticity is a written statement, signed by the artist or an authorised representative, recording who made a work, when, and by what technique. It is usually shortened to COA.

It is not a government document. Its value depends entirely on who signed it. A certificate carrying the artist's own signature is the strongest; a gallery or an estate declaration comes next; a sheet of paper with no traceable source means nothing at all.

What the document should contain#

A certificate that actually helps includes:

• The title of the work, or an inventory number if it is untitled
• The year it was made
• Dimensions in centimeters, height by width, and for tufted work a note on whether fringe and edge binding are included in the measurement
• The technique, for example acrylic on canvas, or tufting with mixed cut pile and loop pile
• Materials, such as acrylic on cotton canvas, or acrylic yarn on cotton backing cloth with latex sealer
• Edition details: unique, or numbered within a stated edition size
• The artist's name and wet signature
• The date of the certificate
• A photograph of the work, ideally on or attached to the document
• A care note, optional but one of the most useful parts for the owner

Printing on acid free paper and keeping two copies, one with the buyer and one in the artist's archive, is a good habit.

Why it matters#

Resale

It is the first thing a second hand buyer asks about. Without it, they have to question both the authenticity and the price, and the usual outcome is a lower offer or no sale at all.

Insurance

Adding a work to a home policy as a valuable item means the insurer wants something showing what it is and what it is worth. An invoice, a certificate and a decent photograph together make that conversation short.

Inheritance and handover

Twenty years on, nobody remembers who made the piece in the hallway or what year it dates from. The certificate is the only thing carrying that information alongside the work.

Gifts

A certificate changes the weight of a gift. A signed document and a short care card in an envelope turn the thing in the box into a piece of work rather than a decorative object.

Can you buy a work without one?#

Yes. If you are buying directly from a living artist, the strongest evidence is the artist and your own correspondence.

Ask for the details in writing, though. Email is enough: title, year, dimensions, technique, materials and the price you paid. Keep that exchange together with photographs of the work. For a small, modestly priced piece, say a 30x40 cm canvas, an invoice plus that exchange usually covers it.

The situation where a certificate genuinely matters is a high priced work bought second hand, whose maker cannot be reached and whose signature cannot be read. If there is no document there, think again before paying.

Where the signature and the details live#

On canvas the signature usually sits in a lower corner of the front, sized so it does not disturb the composition. Some painters never sign the front and put everything on the back. That is a preference, not an omission.

The real record is on the reverse: title, year, dimensions, technique and the artist's name, written on the top stretcher bar or on the back of the cloth. Turning a painting around and reading the back is the step buyers skip most often.

Prints have a long standing convention. The signature goes in the white margin below the image, in pencil: edition number on the left (12/50, for example), title in the centre, signature and year on the right. Pencil is used because it cannot be reproduced along with the print, and because a later addition is easy to spot.

Tufted work is never signed on the front, since a looped surface cannot hold a fine line. The usual method is a studio label sewn onto the back, carrying the title, year, dimensions and signature. It has to go on after the sealer has dried and before the edge binding is applied; sew it later and the stitching cannot pass under the binding, so the label sticks out at the edge. On some pieces the signature is tufted instead, a few loops in a different colour in a lower corner.

Edition, reproduction, original#

The edition line causes the most confusion. Three cases cover almost everything:

• Unique original: one exists, there is no copy.
• Original print in an edition: as with etching, screen print or lithography, the matrix came from the artist's own hand. Each impression is numbered and signed, and the plate is cancelled once the edition closes. These count as original works.
• Reproduction: a print made from a photograph of an existing painting. Even signed, it is not an original work, and the certificate should say so plainly.

The line between the first two and the third is drawn in original work or print, and how printmaking techniques are told apart is covered in what an etching is.

Questions to ask before you pay#

Do not worry about seeming difficult. A serious seller expects these.

• Is this unique or part of an edition? If it is an edition, how many were made and which one is this?
• Does the work come with a signed certificate, and what information does it carry?
• Do the stated dimensions include the frame? For tufted work, do they include the fringe?
• Which materials were used? Paint type and canvas weight for a painting; yarn type and backing cloth for tufting.
• Has a varnish or sealer been applied, and what should I watch out for in care?
• Has the piece been sold, exhibited or published before?
• If it is damaged, can it be repaired, and does the artist do that work?

A seller who answers all seven clearly has probably made the work carefully too. If the answers wander, take your time.

A certificate is not always a separate sheet#

The word certificate suggests printed, stamped paper. Identity can travel with a work in other ways. On a one off piece that is signed and carries a label sewn to its back, the information sits in the object itself, and the name, year and size on that label never leave it. A separate sheet can go missing or stay behind in a drawer. A sewn label travels with the work.

The practice at Peck Art Studio is straightforward: no separate certificate of authenticity is issued, and a studio label is sewn to the back of each piece. Everything is made as a single work, with no editions and no reproduction prints.

That distinction has a practical side. The list of questions above matters most for edition work and for anything bought second hand whose maker cannot be reached. On a unique piece bought from the person who made it, the source of the identity is already clear.

Other questions about buying, shipping and care are gathered on the frequently asked questions page.