Certificate of Authenticity, Explained

A certificate of authenticity gets mentioned constantly in art sales and rarely explained. It’s not a formality or a nice extra — it’s the document that turns “a painting” into a specific, verifiable, insurable object.

What it should contain

At minimum, a real certificate states the artist’s name, the work’s title, medium (oil on canvas, for example), exact dimensions, and the date or date range of creation. It should carry the artist’s or studio’s signature, and ideally a unique reference tying it to the specific piece — a series and plate number, for instance, rather than a generic template with fields filled in.

Why insurers ask for it

Fine art generally can’t be insured, or can only be insured at a fraction of its value, without documentation establishing what the object is and what it’s worth. The certificate is the baseline paperwork an insurer needs to treat the piece as the specific asset it is, rather than as unverifiable personal property.

Why the next buyer will ask for it

If you ever resell, the person buying from you will want the same reassurance you presumably wanted when you bought it. Without a certificate, you’re asking a future buyer to trust your word about a piece they’re seeing secondhand, from a seller (you) who isn’t the artist. That’s a much harder sell than passing along documentation that was there from the start.

What a certificate can’t do

It’s worth being clear-eyed here: a certificate proves the piece came from the stated artist under the stated circumstances. It doesn’t independently prove the artist’s claims about process or technique — that’s what documentation like process photos or session video is for, separately. The two serve different purposes and a serious seller should offer both.

If a seller can’t provide one

This isn’t automatically disqualifying — some emerging artists genuinely haven’t formalized the paperwork yet. But it’s reasonable to ask why, and reasonable to expect one to be created before a sale over a few hundred dollars, let alone a few thousand. A seller who resists producing one for a significant purchase is a real signal worth taking seriously.