Commingled inventory (also called stickerless inventory) occurs when products from multiple sellers are stored together in Amazon's fulfillment centers without seller-specific FNSKU labels. When an order is placed, any seller's unit may be shipped regardless of which seller made the sale.
Commingling creates risk: if another seller sends counterfeit or damaged products under the same ASIN, your customers might receive those inferior units — leading to negative reviews, A-to-Z claims, and potential account health issues.
RIDGE risk analysis flags niches where commingling risk is high (high seller count, commodity products) and recommends FNSKU labeling strategies to protect brand integrity.
A seller with premium quality supplements uses commingled inventory. A counterfeit seller sends cheap knockoffs under the same ASIN. Customers randomly receive the counterfeit version, leave 1-star reviews on the original seller's orders, damaging their rating from 4.7 to 4.1.