Rejected at the Amazon Dock? FBA Prep Problems to Catch Before Your Container Leaves China

Direct answer: Most FBA rejections trace to labeling and carton-mark errors caught too late — missing or unscannable FNSKU labels, mixed SKUs in one box, wrong box marks, non-compliant cartons or pallets. The fix is a pre-departure checklist run in China before the container seals: verify FNSKU labels (one per sellable unit, scannable, correctly applied), confirm carton marks and carton specs, and check pallet/wrap rules if shipping palletized. Catching these at our Shenzhen/Dongguan warehouse costs minutes; catching them at the Amazon dock costs weeks.

By the Warehouse QA team, Baton Logistics (Shenzhen/Dongguan) — we inspect thousands of FBA cartons, and the same five mistakes show up again and again.

The FBA pre-departure checklist

Run this before the container leaves the warehouse. Tick every box.

1. Labels (per unit)

• ☐ Every sellable unit has a scannable FNSKU label (Amazon barcode, not just manufacturer UPC)
• ☐ Label applied flat, no wrinkles/tape-over, not on a curved seam
• ☐ No price tags or stray barcodes that could mis-scan
• ☐ GS1 / UPC product identifier handled separately from the FNSKU (don't merge the two)

2. Carton marks (external)

• ☐ Shipment ID / FBA box label on the outside of each carton
• ☐ Correct box count (e.g., "Box 3 of 10")
• ☐ No mixed SKUs in a single carton unless Amazon-approved
• ☐ Fragile/team-lift marks where required

3. Carton requirements

• ☐ Carton within Amazon's size/weight limits for the lane
• ☐ No polybag without suffocation warning where required
• ☐ Secure, single-SKU packing; void-fill not overstuffed

4. Pallet requirements (if palletized)

• ☐ Standard pallet size for the destination (e.g., GMA 48×40" for US)
• ☐ Stretch-wrapped, stacked safely, no overhang
• ☐ Labels visible on more than one face

The 5 most common rejection causes

1. Unscannable or missing FNSKU — the #1 reason units are set aside.
2. Mixed SKUs in one box — Amazon requires single-SKU cartons unless pre-approved.
3. Wrong or missing box labels — no Shipment ID or bad box count.
4. Carton out of spec — overweight/oversized cartons.
5. Pallet non-compliance — wrong pallet size, poor wrap, overhang.

Catch it in China, not at the dock

Our Amazon FBA and Warehousing teams run this checklist during consolidation and re-label/re-pack before sealing. A 30-minute QC pass in Shenzhen beats a 3-week return from a US fulfillment center.

FAQ

Q: Why was my Amazon FBA shipment rejected?
A: Usually labeling or carton-mark errors — missing/unscannable FNSKU labels, mixed SKUs per box, wrong box labels, or cartons/pallets out of Amazon's spec.

Q: What are FBA labeling requirements for shipments from China?
A: Each sellable unit needs a scannable FNSKU label applied flat and unobstructed; cartons need the Shipment ID and correct box count; GS1/UPC identifiers are handled separately from the FNSKU.

Q: Can I mix SKUs in one carton to Amazon?
A: Generally no — Amazon requires single-SKU cartons unless you have pre-approval for a mixed-SKU box. Mixed boxes are a common rejection cause.

Q: What are FBA pallet requirements?
A: Use the destination's standard pallet (e.g., GMA 48×40" for the US), stretch-wrap securely, avoid overhang, and keep labels visible on multiple faces.