Every unit gets its FNSKU barcode printed, applied over the original UPC, and scan-verified to Amazon's specification — in 24–48 hours from our Miami warehouse. Amazon ended its own US labeling service in January 2026; ProShip3PL is the replacement: labeling, relabeling, barcode replacement, expiration and suffocation labels, for sellers nationwide and worldwide.
Three codes matter in FBA. The UPC or EAN is the manufacturer's barcode — identical for every seller of the product. The ASIN is Amazon's catalog page ID. The FNSKU is yours alone: it marks your units of that ASIN inside Amazon's network. When Amazon requires labeled inventory, the FNSKU must cover the original barcode so warehouse scanners can never read the wrong one.
Until 2026, careless sellers had a safety net: Amazon would apply missing labels for a per-unit fee. That service is gone. Shipments created after January 1, 2026 that arrive unlabeled or unprepped face receiving delays, stranded stock — and are no longer eligible for reimbursement if damaged or lost in the process.
Our labeling floor in Medley, FL closes that gap. We print on laser stock, apply to Amazon's placement rules, cover the original barcode fully, and scan-verify every label before the carton is sealed. Wrong labels are how good inventory becomes unsellable — so verification is the step we never skip.
| Label type | What it's for |
|---|---|
| FNSKU label | Amazon's required seller-specific barcode, applied over the original UPC/EAN |
| Relabeling / barcode replacement | Fixing factory mistakes, unscannable codes, and removal-order stock going back into FBA |
| Expiration-date label | Required for grocery, supplements & topicals in Amazon's date format |
| Suffocation warning | Required on poly bags with a 5″+ opening — included with our bagging service |
| Set / sold-as-single-unit labels | Required on bundles and multipacks so Amazon never splits them |
Most labeling jobs arrive with related prep needs. Everything below happens under the same roof, in the same 24–48 hour window.
Printed, applied over the original barcode, and scan-verified — per-unit pricing at any volume.
Removal orders, factory errors, and unscannable barcodes fixed and returned to FBA as sellable stock.
Suffocation warnings, expiration dates, and set labels applied exactly where Amazon's rules demand.
Bagging with warnings included, bubble wrap for fragile SKUs — labeled after packaging so codes stay scannable.
Cartons, pallets and full containers — counted and condition-checked before labeling starts.
Box content data, carton labels, and hand-off to your carrier — inventory goes from unlabeled to checked-in fast.
Ship us your inventory and share the FNSKU list from Seller Central — or we pull it from your shipping plan.
Units counted against your PO and condition-checked; damage is photographed and reported before labeling.
FNSKU applied over the original barcode and scan-verified unit by unit — 99.9% accuracy.
Cartons sealed with box-content labels and shipped to Amazon's assigned FCs within 24–48 hours.
Ship them here instead of to Amazon. We strip or cover the bad labels, apply the right ones, and scan-verify the batch before it moves.
Usually low-quality thermal print, glossy stock, or labels over seams. We reprint on laser stock, replace, and test every code with a scanner — not eyes.
Point the removal at our address: units get inspected, graded, relabeled and returned to FBA — recoverable stock instead of a write-off.
Variant mix-ups are the most expensive labeling error. We match each unit's physical attributes against the FNSKU list before the label goes on.
The transition batch is the dangerous one. Send it through us: existing barcodes covered, FNSKUs applied, and the changeover done in one pass.
Expiration labels go on in Amazon's required format alongside the FNSKU, with shelf-life verified against receiving minimums first.
| Factor | Label at the factory | Label & verify in the US |
|---|---|---|
| Unit economics | Cheapest per unit at high volume | Costs more per unit, includes verification |
| Error detection | Mistakes surface at Amazon — too late | Caught at our dock, before check-in |
| Accountability | Claims against an overseas factory are slow | A US partner answers the phone same day |
| Worst case | Thousands of stranded, mislabeled units | A batch held and fixed before shipping |
| Smart hybrid | Factory applies labels on big runs — we verify samples and fix exceptions on arrival | |
Since Amazon stopped fixing labeling mistakes on arrival in 2026, the question isn't factory or prep center — it's whether anyone checks the work before Amazon does.
An FNSKU (Fulfillment Network Stock Keeping Unit) is Amazon's own barcode that ties a physical unit to your specific seller account and listing. Amazon requires it so your inventory is credited to you — not mixed with other sellers' stock — and so fulfillment centers can pick and ship the right item. Without a scannable FNSKU, most FBA inventory cannot be received.
A UPC/EAN is the manufacturer's universal barcode, the same for every seller of that product. An ASIN is Amazon's catalog ID for the product page. The FNSKU is seller-specific: it identifies your units of that ASIN in Amazon's warehouses. When labeled inventory is required, the FNSKU must cover or replace the original UPC so scanners never read the wrong code.
Since January 2026 Amazon no longer offers its own labeling service in the US, so unlabeled shipments face receiving problems, stranded or unfulfillable inventory, and — per Amazon's 2026 policy — no reimbursement eligibility if unprepped items are damaged or lost. The fix is to label before the shipment reaches Amazon, either at your supplier or through a prep center.
Labels must be scannable: printed in black on white non-reflective stock, typically 1 x 2 inches or larger, with the barcode and human-readable FNSKU intact — never wrapped around corners or placed over seams. The original manufacturer barcode must be fully covered. We laser-print and verify every label by scan before it ships.
Yes, and for large runs it can be cheaper — but factories routinely apply the wrong label to the wrong variant, print at low quality, or skip covering the original barcode. Many sellers have a US prep center verify factory labeling on arrival, or label domestically where mistakes are caught before Amazon sees them. A mislabeled batch inside FBA is far costlier than having it labeled right the first time.
Commingled inventory uses the manufacturer barcode, letting Amazon pool identical units from multiple sellers. It skips labeling but exposes you to counterfeit and condition risk: a buyer may receive another seller's inferior unit against your listing, and you absorb the complaint. Most private-label and brand-registered sellers choose FNSKU-labeled inventory for full control.
Yes. We relabel inventory pulled back from Amazon in removal orders, fix factory labeling mistakes, replace unscannable or damaged barcodes, and re-cover exposed UPCs — at the same per-unit labeling rate. Send us the stock and the correct FNSKU list, and we handle the rest.
Yes. Topicals, grocery, supplements and similar products need the expiration date printed in Amazon's required format (MM-DD-YYYY or MM-YYYY) in a visible location on the sellable unit — on top of the FNSKU. We apply both and check that remaining shelf life meets Amazon's receiving minimums before shipping.
Any poly bag with an opening of 5 inches or more (measured flat) must carry a suffocation warning, either printed on the bag or as a sticker. Amazon rejects or re-bags non-compliant units at your cost. Our poly bagging service always includes the correct warning label, so it's never a separate worry.
Standard turnaround is 24–48 hours from receipt regardless of batch size — a 10,000-unit labeling job is normal work for our Medley, FL floor, not a special project. Rush same-day handling is available for time-critical replenishments. You'll get confirmation with counts when the shipment leaves for Amazon.
Tell us your SKU count and monthly volume — we'll confirm per-unit pricing and receiving instructions within one business day. Ship your stock from anywhere; it leaves for Amazon labeled, verified and compliant.
