FBA Label Errors? Prevent Inbound Rejections in 2026

FBA Label Error Prevention Guide: Essential Guidelines for Successful Inbound Shipments

Currently, non-compliance with Amazon's FBA labeling policy can lead to inbound shipment rejections, per-unit fees, and even account suspension. Therefore, accurate FNSKU label application is no longer optional—it's mandatory.

If you're an Amazon FBA (Fulfillment by Amazon) seller, you need to pay close attention to two significant policy changes that have recently been implemented. Overlooking these changes could result in unexpected costs and operational disruptions.

Key Policy Changes

1. FBA Prep and Labeling Service Discontinuation: Amazon's FBA Prep and Labeling Service has officially been discontinued for the US store (or recently). This means Amazon will no longer apply FNSKU (Fulfillment Network Stock Keeping Unit) labels to your products. Now, sellers are solely responsible for all labeling, and failure to label products yourself could make inbound shipments impossible.

2. Barcode Requirement Changes: Barcode requirements have recently changed, mandating that resellers must use an Amazon barcode, specifically an FNSKU, even if the product has a manufacturer barcode. While brand owners may continue to use manufacturer barcodes under specific conditions, this policy change is crucial for most Korean sellers, who typically fall under the reseller category. Label errors directly lead to inventory inbound delays, lost sales, and unnecessary additional costs, making it vital to understand accurate labeling methods right now.

Key Labeling Rules for Successful FBA Inbound Shipments

Confirm FNSKU Usage Requirement: According to the recently changed policy, resellers must use an Amazon barcode (FNSKU) instead of a manufacturer barcode. You must confirm whether your products fall under this requirement and prepare FNSKU labels if necessary.

Adhere to Accurate Label Printing Standards: Resolution and Ink: Labels must be printed with black ink on white, non-reflective paper at a minimum resolution of 300 DPI (Dots Per Inch). Since inkjet printers are prone to smudging, thermal or laser printers are recommended. Margins: Ensure sufficient white space (Quiet Zone) around the barcode and text. This is typically 0.25 inches (approx. 6.35mm) on the sides and 0.125 inches (approx. 3.175mm) on the top and bottom. Information Inclusion: In addition to the FNSKU barcode, the Product Name and Product Condition must be clearly included.

Correct Label Application Method: Completely Cover Existing Barcodes: Any manufacturer barcodes (UPC, EAN, ISBN, etc.) already printed on the product must be completely covered by the FNSKU label. Multiple scannable barcodes can confuse scanners and cause inbound delays. (Transparency codes are an exception.) Apply to Flat Surfaces: Labels should be affixed to a flat surface of the product packaging, ensuring they do not wrap around corners, seams, openings, or curved areas. Externally Scannable: If there is external packaging such as a polybag, the label must be applied so that it is clearly visible and scannable from the outside.

Labeling Individual and Special Items: Individual Items: Every individual item (Unit) within a case pack must have its own FNSKU label affixed. Bundled Items: Attach a "Sold as set" or "This is a set. Do not separate" label to bundled items to prevent them from being separated. Overweight Boxes: For boxes exceeding 50 pounds (approx. 22.67kg), a "Team Lift" label must be affixed to the top and sides of the box. For boxes exceeding 100 pounds (approx. 45.35kg), a "Mechanical Lift" label must be affixed to the top and sides.

Serious Consequences of Policy Non-Compliance

Inbound Delays and Rejections: Label errors can cause products to be delayed or outright rejected at Amazon Fulfillment Centers. This directly leads to lost sales opportunities. Additional Fees Incurred: Amazon will relabel or manually process products with label errors, resulting in unexpected fees of $0.15 to $0.30 per unit. These costs can accumulate much faster than you might expect. Lost Sales and Ranking Decline: If inventory isn't received on time, products won't be available for sale, leading to lost sales opportunities. This can decrease your product's Sales Velocity, resulting in an Amazon ranking decline, and potentially wasting your ongoing PPC (Pay-Per-Click) advertising spend. Future Shipping Restrictions and Account Suspension: Repeated violations of labeling policies can lead to restrictions on your future FBA shipping privileges or, in severe cases, even seller account deactivation.

Immediate Action Plan

1. Establish FNSKU Generation and Printing Process: Create a standardized procedure in Seller Central to accurately generate each product's FNSKU and print it using a thermal or laser printer with a resolution of 300 DPI or higher. (Path: Inventory → Manage FBA Inventory → Print item labels). 2. Verify Complete Coverage of Existing Barcodes: After affixing the FNSKU label to all individual products, add a step to meticulously visually inspect that existing manufacturer barcodes (UPC, EAN, etc.) are completely covered by the FNSKU label. 3. Periodically Test Label Scannability: Regularly test whether printed labels can be scanned without issues using an actual scanner (e.g., a smartphone barcode scanner app). Blurry or damaged labels must be replaced immediately.

⚠️ Caution When Using Recycled Boxes When using returned or recycled shipping boxes, it's common for scanners to read incorrect information because existing FBA labels or carrier labels remaining on the box are not completely covered. All existing labels must be completely removed or covered with an opaque label.

⚠️ Avoid Using Inkjet Printers Labels printed with an inkjet printer can easily smudge or fade due to moisture or friction, making the barcode unscannable. This is a major cause of inbound delays, so you must use a thermal or laser printer.