Listing Hijacker
A third-party seller who jumps onto your listing and starts selling counterfeit, knockoff, or unauthorized versions of your product.
A "listing hijacker" is a third-party seller who lists their own (often counterfeit, knockoff, or used) product on YOUR brand-registered ASIN. Because Amazon listings are organized by ASIN rather than by seller, multiple sellers can technically list under the same ASIN — this is by design for commodity products. But for branded products, hijackers exploit this to free-ride on your reviews, brand authority, and search ranking while shipping inferior products.
The immediate damage: hijackers undercut your price (collapsing the Buy Box), receive negative reviews on your listing, and may even ship counterfeits that get tied to your brand. The long-term damage: degraded review score, suspended listings, and brand reputation damage.
Defense playbook: enroll in Amazon Brand Registry, set up Brand Protection alerts, monitor your ASINs for new sellers daily, send formal cease-and-desist letters to hijackers, file Brand Registry takedowns through the violation form, and use test buys to document counterfeit shipments. SellerVault's seller alerts include hijacker detection — you get notified within minutes of a new seller appearing on a brand-protected ASIN.