Amazon's labeling requirements are strict and frequently updated. A single mislabeled product can result in your entire shipment being rejected, delayed, or assessed additional fees. Here's everything you need to know.

FNSKU Labels: The Basics

The FNSKU (Fulfillment Network SKU) is Amazon's internal tracking barcode. Every unit you send to Amazon must have this label visible and scannable — covering any manufacturer barcodes.

  • Minimum size: 1" x 2" (barcode readable at typical scan distance)
  • Must be printed in black ink on white, non-reflective paper
  • Cannot be placed on seams, folds, or curved surfaces
  • Must cover any existing retail barcodes (UPC, EAN, etc.)

Poly Bag Labels: Suffocation Warnings

Any poly bag with an opening larger than 5 inches (in any direction) must include a suffocation warning. This can be printed directly on the bag or on an adhesive label.

Required text: "WARNING: To avoid danger of suffocation, keep this plastic bag away from babies and children. Do not use this bag in cribs, beds, carriages or playpens."

Expiration Date Labeling

  • Must be formatted as MM-YYYY or MM/DD/YYYY
  • Must be visible on the outside of the packaging
  • Must be placed on each unit AND on any outer carton
  • Minimum expiration date varies by category (typically 90-180 days remaining)

Transparency Labels

If you're enrolled in Amazon's Transparency program (for brand protection), each unit must have a unique Transparency code applied. This is in addition to the FNSKU label.

Carton Labels

  • Each shipping carton needs an Amazon Shipment ID label (printed from Seller Central)
  • Place on the largest flat face of the carton
  • Do not place over seams or corners
  • Remove or cover any old shipping labels or barcodes

💡 QuickShipment tip: We apply all labels — FNSKU, suffocation warnings, expiration date stickers, and carton labels — as part of our standard prep service. Our team knows the current Amazon requirements for every category.

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