KAWS releases work as vinyl figures, prints and paintings, and the figures carry most of the counterfeit volume because they are produced in editions, sold out instantly, and resold at multiples of retail. There is no central authentication body, so the reads are physical and documentary.
Vinyl figures are read on their moulding, their paint application, their base stamping and their packaging. Genuine production has crisp mould lines, even paint with no overspray, and stamped copyright and edition information on the underside.
For prints, the publisher's documentation and the edition marking carry the case, as with any contemporary print market.