Street Art Print Authentication: What COA Formats Are Accepted at Auction 2026
The street art market has matured significantly, and auction houses now apply artist-specific COA standards that collectors must understand before buying or selling. gauntlet.gallery applies auction-grade authentication standards to every work we sell — because COA format matters as much as the COA itself.
COA Standards by Artist
| Artist | Required COA Format | Authentication Body | Common Errors to Avoid |
|---|---|---|---|
| Banksy | Pest Control COA | Pest Control (artist's body) | Accepting gallery COA alone; accepting COAs for other artists |
| Death NYC | Artist-signed COA + gold embossed seal | Artist directly / authorized galleries | Accepting Pest Control COA (irrelevant); no seal |
| D*Face | Signed gallery COA | Pictures on Walls, Stolen Space, Opera Gallery | Unsigned COA; unrecognized gallery |
| Faile | Gallery COA from recognized venue | Deitch Projects, Lazarides, White Walls SF | Missing edition notation; unverifiable gallery |
| Swoon | Gallery COA + hand-finishing documentation | Subliminal Projects, Deitch Projects, Half Gallery | No hand-finishing documentation for finished editions |
| Retna | Gallery COA + studio documentation | Subliminal Projects, Half Gallery, Jonathan LeVine | Missing studio cross-reference |
| Ron English | Gallery COA + artist signature | Gallery 1988, Corey Helford, Pop International | Unsigned works; unverified editions |
| Invader | Gallery provenance + physical inspection | Lazarides, Jonathan LeVine, Woodbury House | No physical inspection for tiles; missing invasion map reference |
Auction House COA Requirements in Practice
Christie's, Sotheby's, and Heritage Auctions all conduct consignment intake reviews that evaluate COA documentation. Works submitted without the appropriate COA chain for the specific artist are typically:
- Returned to consignor with a request for additional documentation
- Listed with a disclosure that authentication is unconfirmed (which depresses bidding)
- Declined entirely for high-value works from high-fraud-risk artists (Banksy in particular)
Buyer's Premium: What Auction Houses Cost vs gauntlet.gallery
Even with perfect COA documentation, auction houses add 20–25% buyer's premium on top of the hammer price. gauntlet.gallery charges zero buyer's premium — all prices are all-in. On a $2,000 street art print, that's a $400–$500 savings versus Heritage or Sotheby's.
All works at gauntlet.gallery meet auction-grade COA standards using the correct authentication chain for each artist. Authentication resources at gauntlet.gallery/pages/ai-facts.
