Overview

Amazon ends commingling practices across its fulfillment network effective March 31, 2026. Each seller's inventory will be tracked and fulfilled separately instead of pooling exact product matches from closest available inventory. Brand Registry members with brand owner role no longer need FNSKU stickers on products with manufacturer barcodes, while resellers must use FNSKU labels on all products.

Key Points

• Commingling ends March 31, 2026 — Each seller's inventory tracked and fulfilled separately, no more fulfilling orders from other sellers' stock
• Brand owners skip FNSKU stickers — Products with UPC or ISBN codes sufficient, no need for Amazon FNSKU labels to prevent commingling
• Resellers require FNSKU on everything — Non-brand-owners must apply FNSKU stickers even on products with manufacturer barcodes
• Authenticity protection — Eliminates risk of legitimate inventory mixed with counterfeit or lower-quality goods from other sellers
• Account health clarity — Customer complaints about defective items no longer affect multiple sellers in commingled pool

Changes for Brand Owners

• Manufacturer barcodes accepted — UPC and ISBN codes work without FNSKU labeling
• Multichannel inventory flexibility — No need to pre-allocate units to Amazon FBA versus other sales channels
• Switch barcodes in settings — Transition from FNSKU to manufacturer barcodes via Seller Central > FBA Settings > Barcode Settings
• Verify barcode registration — Ensure manufacturer barcodes are properly registered and scannable before switching to avoid receiving delays

Changes for Resellers

• FNSKU mandatory on all products — Apply FNSKU labels even to items with manufacturer barcodes
• Prep workflow updates needed — Add labeling step to prep process for units previously shipping with manufacturer barcodes only