Frequently Asked Questions (FAQs)

How do I prep Amazon FBA inventory now that Amazon ended prep and labeling services?

Starting January 1, 2026, Amazon no longer offers prep or labeling services (including FNSKU labeling, poly-bagging, bubble wrap, and bundling) for inbound FBA shipments in the U.S. This means you must prep and label all units yourself or via a 3PL before inventory reaches Amazon fulfillment centers. If inventory arrives unprepped or improperly labeled, Amazon can reject it, return it at your cost, or charge rework fees.

What are the Amazon poly bag suffocation warning requirements for large 2026 shipments?

When you use a poly bag for large FBA shipments, you want to pay attention to the following warning requirements:

• Any bag with an opening of 5 inches (12.5 cm) or larger (measured flat) must include a suffocation warning.
• The warning must be clear, visible, and legible on the bag (printed directly or as a label).
• Common warning text: "WARNING: To avoid danger of suffocation, keep this plastic bag away from babies and children." (exact text and font sizing rules are detailed in Amazon prep docs).
• Polybags must be transparent, completely sealed, at least 1.5 mil thick, and have a scannable barcode visible through the bag or attached outside.

Getting these warning requirements right prevents Amazon from re-bagging your inventory (and the extra fees that come with it).

Can I use manufacturer barcodes instead of FNSKU labels for FBA?

Every unit must have a scannable barcode that Amazon can use to track the item. This can be an Amazon FNSKU or, in some cases, a manufacturer barcode (e.g., UPC/EAN).

However, using a manufacturer barcode is allowed, but if multiple sellers use the same manufacturer barcode, Amazon might commingle inventory, meaning your stock could be used to fulfill orders from other sellers. Amazon’s guidelines traditionally recommend FNSKU labels because they tie inventory specifically to your seller account, reducing commingling risk.

What is the maximum weight and size for Amazon FBA shipping boxes?

Standard boxes typically must not exceed 50 lb (≈23 kg) in weight. Boxes over 50 lb generally require a “Team Lift”/“Heavy Package” label. For standard shipments in the U.S., boxes can be up to 36″ long × 25″ wide × 25″ high without penalty. Note that Amazon may allow heavier or larger individual oversize products in special cases. You want to regularly double-check the latest shipping and routing requirements in Amazon Seller Central.

How do I label "Sold as Set" bundles to avoid Amazon warehouse errors?

To correctly prep and label bundles/sets, clearly mark the packaging with text like “Sold as Set – Do Not Separate” or similar messaging. Ensure the entire set is packaged so the items cannot be separated during handling (e.g., shrink-wrapped, boxed, or sealed in a poly bag under poly bag rules).

Apply one barcode (FNSKU or manufacturer) for the set, and cover or render unscannable any individual unit barcodes within the set so Amazon scans only the set barcode.

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