Do You Need a Certificate of Authenticity When You Buy Art at a Fair?

Not strictly, for most purchases — a $150 print or a small original from a living artist does not require formal documentation the way a secondary-market or significant-value piece does. But for anything you might want to insure, resell, or simply prove the history of someday, a certificate of authenticity (COA) is worth asking for even when it is not offered automatically.

When a COA matters and when it does not

It matters most for limited editions and prints, where a COA is often the only document confirming the edition number and total run size; for any secondary-market piece, where provenance is part of the value; and for anything purchased with insurance or future resale in mind. It matters least for a one-off original bought directly from the artist for modest sums purely to live with — though even then, a simple signed invoice naming artist, title, and date is worth having.

What a real COA should include

• Artist's name and, ideally, their signature
• Title of the work and year created
• Medium and dimensions
• Edition number and total edition size, for prints and multiples
• Issuing gallery or artist contact information
• Date of sale and, ideally, the original purchaser's name

Red flags in a certificate

A certificate that is generic, undated, unsigned, or issued by a party with no clear connection to the artist or gallery is worth questioning — a COA is only as credible as whoever stands behind it. For anything beyond a modest purchase, a certificate from the gallery or artist directly carries far more weight than one from an unrelated third party.