Contributors who own a fake and a genuine version of one item shoot them side by side in the same light from the same four angles (front, back, logo, label or serial), then say which is fake and what gave it away. Single items, mismatched angles and missing close-ups are rejected; one pair per contributor, so categories follow what gets faked where contributors shop, from Jakarta to London. The label is the owner's belief with a stated reason, not a brand authentication. Brands hold counterfeit samples and release none, so counterfeit models mostly train on one rights holder's seizures; consumers own matched pairs too, usually by accident, and matched capture isolates product from photographic difference.