An FBA seller shipped 5,000 units of kitchen utensils to Amazon's Ontario, California fulfillment center. The inbound shipment was rejected at the receiving dock because the polybags did not have the required suffocation warning. The supplier had used bags from a different manufacturer — same quality, same thickness, but missing the 5mm × 5mm printed warning. The result: the seller paid $1,200 in return freight, $675 in FBA storage fees for the 18 days the goods sat in limbo, and lost 20 days of selling time during the holiday season.

Packaging defects are the most preventable cause of FBA inbound rejection. Unlike product quality issues — which require the right AQL level and detailed functional testing — packaging problems are purely about compliance with Amazon's inbound requirements. And the majority of these defects are visible before the container leaves the factory.

The 7 Packaging Defects That Cause FBA Inbound Holds

1. Missing Suffocation Warning on Polybags

Any polybag with an opening dimension greater than 178mm (7 inches) must display the suffocation warning printed in either English or French (for Canada-bound shipments). The warning must be a minimum of 5mm × 5mm in size. This is the single most common packaging defect we find — present in 23% of FBA shipments we inspect. The fix is trivial: ask your bag supplier to include the warning in the print run. Many budget polybag manufacturers skip it to save on plate costs (~$15-30 per print run).

2. Carton Weight Exceeds 23kg (50 lbs)

Amazon's maximum carton weight for standard FBA shipments is 23kg. Overweight cartons are either rejected at the dock or flagged for an additional handling fee of $1.50-$2.50 per unit. In our inspections, 12% of FBA shipments have at least one carton that exceeds this threshold — typically because the supplier packed more units per carton than the spec allowed. The solution is to weigh 10% of cartons during inspection and flag any that exceed 21kg (to leave a safety margin).

3. Missing or Incorrect FNSKU Barcode

Every FBA unit must carry an FNSKU barcode that matches Amazon's catalog entry. The barcode must be machine-readable (GS1-128 format, minimum 50% of the spec size). We find mismatched or unreadable barcodes in 8% of inspections. Common issues: the supplier used the manufacturer's UPC instead of the FNSKU, printed the barcode at 60% of the minimum size, or placed the label over a seam that causes it to curl. A hand-held barcode scanner at the inspection site catches 100% of these issues.

4. Carton Tape Seal Failure

Amazon requires that cartons be sealed with water-activated tape (gummed tape) or pressure-sensitive plastic tape. The tape must cover the full length of the top and bottom seams, extending at least 7.5cm (3 inches) beyond the end of the seam. During transit, inadequately taped cartons can burst open, causing unit loss or mixing. Our inspectors find taping issues in 15% of FBA shipments — typically tape that is too narrow (< 4cm wide) or not long enough.

5. Mixed SKUs in a Single Carton

Unless specifically authorized by Amazon (case-packed mixed SKU program), each carton should contain only one SKU. Mixing SKUs in a carton can cause the entire inbound shipment to be flagged for manual inspection, which adds 5-10 business days to the check-in process. Our data shows 6% of inspected shipments have mixed-SKU cartons — often because the supplier consolidated partial pallets to save freight costs. The remedy is to physically verify carton contents during inspection by opening 10% of cartons.

6. Expired or Missing Country of Origin Label

All imported products sold on Amazon must display the country of origin in English. For textile items, the label must be permanently affixed (sewn-in, not stick-on). For non-textiles, it can be printed on the product packaging. Customs audits catch 15% of FBA imports with missing or incorrect origin labeling, often resulting in shipment holds at the port of entry. The fix: include the origin labeling requirement in the PO spec and verify 30 random units during inspection.

7. Carton Dimensions Exceed FBA Limits

Standard FBA cartons have a maximum dimension of 63.5cm on any side. Oversize cartons (> 63.5cm on any side) require special handling and incur significantly higher FBA fees. For cartons exceeding 122cm on the longest side, Amazon may refuse acceptance entirely. We find oversize cartons in 9% of FBA inspections — usually because the factory used leftover packaging from a non-FBA order.

The Cost of Packaging Defects: A Real Calculation

Consider a typical FBA shipment of 3,000 units across 150 cartons. If the packaging has 2 of the 7 defects above, the expected cost breaks down like this:

The Pre-Shipment Inspection Solution

A standard pre-shipment inspection that includes the FBA packaging checklist — barcode scanning, carton weighing, tape verification, and label checking — catches all 7 of these defects before the container leaves the factory. The additional time is minimal: adding the packaging checklist to a standard AQL 2.5 inspection takes approximately 15 minutes per 500 units.

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