Wholesale FBA Prep and the Case Pack That Has to Be Opened

The most expensive thing printed on a wholesale unit is usually four words the manufacturer put there for free: not for individual sale.

Those four words turn a case of twenty four into twenty four separate labor operations, or into a listing you have to build from scratch. Wholesale runs on volume and a thin margin per unit, so the line that moves your profit most is how many hands touch that pallet before it clears Amazon receiving. A case that ships the way the manufacturer sealed it costs almost nothing to process. Open it, count it, label it and rebuild it, and you pay on every unit inside, whatever that unit cost you at the distributor.

A sealed case gets opened for exactly four reasons:

• Something has to go on each unit: an FNSKU label, an expiration date, a required warning.
• Something has to come off or be covered on each unit: a retail barcode that is not yours, a "not for individual sale" line, an old promo sticker.
• Something has to go around each unit: a poly bag, bubble, a shrink band, a seal.
• The case is not something Amazon accepts as a shipping box: mixed contents, an unknown count, or past the published size and weight caps.

Every other prep decision on a wholesale lot is a version of one of those four, and each one turns into labor at the bench. That labor is where the margin on a wholesale deal goes.

The year the sealed case stopped being an option for resellers

On January 1, 2026, Amazon stopped providing prep and labeling services for FBA sellers in the United States. FNSKU labels, poly bagging, bubble wrapping, suffocation warnings, set building: none of it happens at the fulfillment center anymore, at any price. Work that used to be billable there is now yours to schedule somewhere else, and a shipment that skips it can be refused, held or left stranded. Amazon has also tied reimbursement eligibility to correct prep, so a sloppy inbound costs you twice.

Three months later, on March 31, commingling closed. Manufacturer barcode eligibility now sits with Brand Registry brand owners selling what they actually make, and everyone moving somebody else's brand labels every unit with an FNSKU. If you are not sure which side of that line your account sits on, the rules that replaced commingling spell out who still qualifies and what happens to units already on the shelves.

Both of the low labor routes wholesale leaned on for years, stickerless inventory and "Amazon will label it on arrival," closed inside one quarter. Labeling used to be an optional line on a wholesale prep quote. It is now a structural cost of the buying model, so reprice any deal you costed on the older assumptions.

The barcode question is really an ownership question

Reselling a brand that is not yours

This is the default condition of wholesale in 2026. A distributor case becomes as many label applications as there are units inside it. The case is opened, each unit gets an FNSKU applied over the manufacturer barcode (over it, not next to it, so only one code stays scannable), and the case is rebuilt. Multiply the unit count in the order by the per unit line on our price list while you are still negotiating with the distributor, because on most wholesale accounts FNSKU labeling is the largest single item on the prep quote and it repeats on every reorder.

Tell whoever does the work one thing before they start: an opened case can still go back to Amazon as a case pack, but only if every carton leaves with the same count. A repack that tidies the leftovers into the last carton costs you the case-packed declaration for the whole shipment.

When the barcode is already yours

If you own the brand and Brand Registry lists you as the maker, the case can ship sealed. Manufacturer barcode eligibility is set per ASIN, though, and it can be switched off, by Amazon or by an old setting on the listing. Check the barcode setting on each listing before you plan a sealed-case shipment. One SKU behaving differently from the rest of the order is the usual way a sealed shipment turns into an opened one after the truck has already arrived.

The carton code nobody thinks about

Distributor cartons almost always carry a carton code on the outside. When that carton travels as the shipping box, the code is one more thing a scanner can catch at receiving, and a wrong scan is how units land against the wrong ASIN. Before a case ships, the outside of it should carry nothing readable except what you want read:

• The distributor's carton code or case UPC, covered or removed.
• Old freight labels and carrier stickers, stripped off.
• Leftover FBA box IDs on a reused carton, gone rather than crossed out.
• The expiration date, on dated goods, still large and still visible.

What Amazon will accept as a case pack

One SKU, one condition, one count, in every carton

The case-packed packing type in Send to Amazon exists for exactly this situation. You state units per case and number of cases, and receiving treats the boxes as repeatable units instead of counting piece by piece. Amazon puts the condition plainly: matching SKU, matching condition, identical quantity in every case. There are also caps on units per case and on the size and weight of a shipping box, and they get revised, so pull the live figures out of the packaging and prep requirements before you commit to a carton size. A distributor carton that lands past those caps stops being an ordinary case pack and picks up the handling that oversize and heavy items need.

The mixed carton

A carton holding two flavors of the same product is a mixed carton. So is a carton holding the same product in two conditions. Declared as case-packed, it fails at receiving and the shipment picks up a defect against your account. Declared as individual units with box content listed by SKU, it goes through, but you have paid for slower processing on both ends. Where a distributor ships assortments by default, ask what it costs to have single SKU cartons picked instead. A pick fee on their invoice usually beats per unit handling on yours.

Masters, inners, and the one you actually declare

This catches people constantly. Case-packed is declared at the level of the box that ships. If the master carton is what moves on the truck, the master is the shipping box, and units per box means everything inside it, not the count in one inner pack. Declare the inner count on a master that ships whole and you get a discrepancy on a shipment where nothing is missing. The inner case is the case only when each one ships as its own box.

The units left over after the last full case

The count per case has to be identical across the shipment, so a partial case cannot ride along as one more case. Leftovers go as their own configuration or into an individual-units shipment. It is a small rule that quietly forces a second shipping plan, and a good argument for buying in whole case multiples whenever the distributor allows it. When they do not, decide where the remainder goes before the freight is booked.

Prep that opens the case whatever the barcode says

Loose units, bags and seals

Distributor cases are packed on the assumption that a store shelf is the destination, not a tote and a delivery van. Bagging, sealing and separating units are per unit operations, and nobody performs them at the fulfillment center now. Size thresholds, suffocation warning wording, seam and scannability rules all apply (see poly bagging requirements). For wholesale the consequence is short: if the case holds loose retail units, that SKU never ships sealed, and unit level bagging belongs in the buy price from the first order.

Units marked not for individual sale

Grocery, beverage and consumables cases often carry that line printed on each unit by the manufacturer, because the unit was made for a multipack. A unit with the marking visible cannot be sold on Amazon as a single, which leaves two routes. Cover the marking on each unit, a per unit cost that comes back on every reorder. Or sell the case as the multipack it already says it is. Wholesale sellers miss the second route routinely. Turning a distributor case into one sellable unit is kitting, which carries its own rules on set marking and counts. The trade is a recurring per unit charge against a one time setup plus a listing decision.

Dated goods and mixed lots

Amazon wants the expiration date printed large on the outside of the case and present on every unit inside, in an accepted date format, with one expiration date per carton. A distributor case holding two lot codes is two cartons as far as that requirement goes. There is also a minimum remaining shelf life at receiving, so take that number from Amazon's own requirements on the day you buy. Mixed dates inside a sealed case are what usually turns a grocery lot that looked clean on paper into a unit by unit sort. Buying dated goods deep, get the production date range in writing before the truck loads: a lot with comfortable shelf life today can fall under the line after weeks in storage waiting for a restock window.

Box IDs, box content and freight

The FBA box ID identifies a shipping box, not a case. When the master carton is what the carrier moves, the master gets the box ID and the inner cases get nothing. The label goes flat on a side, never over a seam or around a corner, so nobody has to cut through a barcode to open the box.

Box content and the pallet specification work the same way for every seller. Follow the FBA shipment checklist for both. At wholesale volume, two habits pay for themselves. Save a case-pack template for each repeating SKU, carrying carton weight, dimensions and prep settings, and a replenishment becomes a two click job instead of fresh data entry every quarter. And build single SKU pallets wherever the order allows, since a pallet holding one item can be cross-docked without being broken down. Keep the case count per pallet consistent while you are at it: a pallet quietly carrying one extra carton is the same discrepancy as a short case, arriving from the other direction.

Where the money actually lands

Several identical cases per SKU change what placement costs

Amazon's inbound placement service charges when your shipment lands in one place and Amazon has to distribute it. Letting Amazon split the inventory across locations removes that charge, and case-packed palletized shipments qualify more easily because they can be cross-docked without being opened. Amazon publishes a minimum number of identical cartons or pallets per item to qualify, each with the same count and mix. Wholesale is the one buying model that hits that condition naturally, worth remembering the next time a deal sheet tempts you into two SKUs shallow instead of one deep.

One touch, everything at once

The expensive part of opening a case is opening it. A second operation on a unit already in someone's hand costs far less than a second visit to the same carton next month. If a SKU is getting labeled anyway, the same touch can absorb:

• A damage and condition check on units already out of the carton.
• The date code, read and recorded rather than assumed from the case.
• Covering a retail barcode or a not for individual sale line.
• Building the multipack you would rather be selling.
• A rebuild into cartons with identical counts, so the shipment still goes in case-packed.

Put that in the standing spec for the SKU, not in an email about one order, and the fifth reorder gets handled the way the first one was.

What each kind of wholesale order costs to prepare

Your situation	Packing type	Case opened?	Where the cost lands
Brand owner, own manufactured SKU, manufacturer barcode active	Case-packed	No	Freight and placement only
Reseller, one SKU per case, retail ready sealed units	Case-packed	Yes, for FNSKU	Per unit labeling
Reseller, loose units that need a bag or a seal	Case-packed after prep	Yes	Labeling plus bagging per unit
Distributor carton holding more than one SKU	Individual units	Usually yes	Slower receiving, per unit handling
Case listed and sold as one multipack ASIN	Case-packed	No, one label outside	Set marking and listing setup, once
Dated product, mixed lots inside one carton	Individual units after sorting	Yes	Sorting plus date labeling

What to ask the distributor before you sign the PO

Every answer here moves a line on your prep quote. Ask before the money moves.

• How many units per case, and is that count identical across the entire lot?
• Does the master carton contain inner cases, and how many units are in each inner case?
• Is there a barcode printed on the outside of the carton, and does it differ from the unit barcode?
• Are the units individually sealed and retail ready, or loose inside the carton?
• Do any units carry a "not for individual sale" or "not labeled for retail sale" marking?
• One lot and one expiration date per case, or can dates be mixed inside a carton?
• What does a full carton weigh, what is the longest side, and can they pack smaller on request?
• If the lot is an assortment, what does it cost to have single SKU cartons picked instead?
• Can they ship on standard pallets, wrapped and labeled, or will it arrive floor loaded?

Send those answers to your prep center with the PO. A quote built on real carton data is one you can hold someone to. A quote built on "a pallet of shampoo" gets corrected later, in your disfavor.

Lots bought from an overseas supplier add a leg in front of all of this. Customs clearance, an importer of record and a delivery address that is not a fulfillment center all land on sellers importing into the US before a single case gets opened, and every case pack question still applies on top of that.

Wholesale shipments also throw more count discrepancies than small parcel ones, for the simple reason that nobody counts a sealed case twice. A shortage claim runs on documents and a filing window, and a bad count is one of the standard ways a shipment ends up rejected, delayed or surcharged. The wholesale specific half of it is that somebody has to count cartons on arrival and write the number down that day, which is the practical argument for landing freight at a prep center instead of straight at a fulfillment center.

Case pack odds and ends

Can wholesale inventory still go to Amazon without FNSKU labels?

For a reseller buying branded goods, no. The more useful question is what happens if a shipment goes out unlabeled anyway. Nobody applies the label on arrival now, so the units sit unsellable, and recovering them means a removal order, freight, labeling and a second inbound: several times the cost of the label it replaced.

Is case-packed always cheaper than individual units?

Cheaper on Amazon's side, yes: faster receiving, easier cross-docking, better placement options. On your side it depends entirely on whether the case can stay closed. A case-packed declaration on cartons that all get opened for labeling saves nothing at the prep center, it only speeds up the last leg.

What actually happens if two cases in my shipment have different unit counts?

Receiving finds a count that does not match the declaration. Best case, the units are received and your shipment carries a discrepancy. Worse case, it is flagged and units sit unavailable while it gets worked out. Either way it becomes a defect, and defect charges apply per unit, which on wholesale volume is not a rounding error. Count a sample of cartons before anything is declared.

Should I break a master carton down and ship the inner cases?

Only when the inner is a real box: rigid, taped, able to hold a shipping label and survive a conveyor. With the right inner you get lighter boxes, more box IDs and a clean set of identical cases. A flimsy inner tray sent on its own arrives crushed, and then you are working a damage claim instead of a receipt. If the inner is display packaging, ship the master whole and declare the count inside it.

Can I list and sell the whole distributor case as one unit?

Yes, but the work moves from the warehouse to the listing. A case sold as one unit needs its own multipack ASIN with the pack quantity stated, not a case shipped against the single-unit ASIN, and that new ASIN starts with no reviews and no ranking history. If demand does not show up, reversing the decision means opening every case after all, so test it on one order first.

Do I need a prep center if my distributor offers to label for me?

If the distributor genuinely applies correct FNSKUs, covers the manufacturer barcode, and packs to Amazon's carton rules, that is the cheapest path available and you should take it. Verify the first shipment yourself rather than trusting the offer. Most distributors label to their own retail standards, not Amazon's, and one rejected pallet costs more than the labeling saved. A prep center is also where partial cases, mixed lots and repacks get sorted out without shipping product twice.