Operations: fulfilment, packaging & compliance
A wholesale order is not an order in the Amazon sense. Nobody clicks buy. A buyer sends a purchase order, you confirm it, you build it, you ship it against their instructions, you send an invoice, and thirty days later you get paid. Every one of those steps is a thing you have to do, and Seller Central does none of them for you.
That gap is where most Amazon sellers lose their first wholesale account. Not on price, not on product, but on turning a PO into a correctly labelled pallet at the right dock on the right day. Here is the whole sequence, in order, with the parts that actually bite.
Step one: the purchase order arrives
It comes as a PDF by email, or as a file in the buyer's portal, or as an electronic document if the account is large enough to require it. Whatever the delivery method, read it like a contract, because it is one.
The things that matter on the page are the PO number, the ship-to address, the ship window, the item lines with the buyer's own item numbers alongside your UPCs, the case quantity, the unit cost, the payment terms, and a reference to a routing guide or vendor manual that you are expected to already have.
Two fields cause more trouble than the rest. The first is the ship window — usually a start date and a cancel date. Arriving before the window opens gets a truck turned away. Arriving after the cancel date gets the order cancelled, sometimes with a fee. The second is the case quantity. If the PO says twelve eaches per case and you ship six, the receiving scan fails and the whole shipment goes into a discrepancy queue.
Confirm the PO in writing within a day or two, even if the buyer has not asked you to. Acknowledge the quantities you can actually ship and the date you will ship them. Silence reads as agreement to everything, including the parts you cannot do.
Step two: check you can really fill it
This is where Amazon sellers get caught, because the stock on your Seller Central dashboard is not stock you can ship to a warehouse in Pennsylvania.
Work out three numbers before you confirm anything. How many units are in your own warehouse or at your 3PL right now, unallocated. How many are in FBA and therefore effectively unavailable for the next several weeks. How many are on a container that has not landed yet.
If the answer requires pulling stock back out of Amazon, know the cost and the timeline before you promise a date. Removal orders take time, the units come back with FNSKU labels on them that retail does not want, and the condition is mixed. The full picture is in FBA removal orders for wholesale. Treat it as a rescue, not a plan.
The durable fix is an allocation rule that reserves a slice of every production run for the wholesale channel before the FBA restock is calculated. Inventory split between Amazon and wholesale works through how to set that number without starving your listings.
Step three: build the order the way they asked
A wholesale pick is not a parcel pick. You are assembling a unit of measure the buyer specified, usually cases, sometimes inner packs, occasionally a mixed pallet.
The packaging itself has to be right. Retail shelves want a package that faces forward, carries a legible barcode on the back or base, and survives being opened with a box cutter by someone who is not gentle. Amazon wants a poly bag with a suffocation warning and an FNSKU sticker. These are different objects, and which one you make first changes your cost structure. FBA prep vs wholesale packaging lays out both standards side by side.
Then the cases. A master carton needs the buyer's required markings: your company name, the item description, the buyer's item number, the UPC of the item inside, the case quantity, the PO number, and a carton label that their scanner can read. Larger accounts want a GS1-128 label with a serial shipping container code on it, which is a different barcode from the UPC on the product. The difference is explained in GS1 barcodes for Amazon and retail.
Then the pallet. Standard pallet, stacked to the height their guide allows, boxes not overhanging the edges, shrink wrapped to the deck, with a pallet placard on two adjacent sides. If a pallet is unstable when the forklift lifts it, the driver can refuse it.
Step four: ship it their way, not your way
You do not choose the carrier. The routing guide does.
For a small order the guide may allow small parcel on your own account. Above a weight or carton threshold it switches to less-than-truckload freight, and the buyer names the carrier, often on their own account number so they control the rate. Some accounts require you to submit a routing request a few days before the ship date and wait for them to assign a carrier and a pickup appointment.
Three documents move with the shipment. A bill of lading, which is the contract with the carrier and carries the PO number. A packing list, which says exactly what is in each carton. And, for most accounts above a certain size, an advance ship notice transmitted electronically before the truck leaves, so the receiving dock can scan cartons against a document they already hold.
Getting the advance ship notice wrong is the single most common source of deductions from a first invoice. If the carton labels do not match the notice, the receiver has to key the shipment in by hand and charges you for the privilege. How small brands handle this without buying a full integration is covered in EDI for small brands.
Step five: invoice and get paid
The invoice is not a formality. It is the document their accounts payable system matches against the purchase order and the receiving record, and any mismatch stops payment.
Put the PO number on it. Use the same item numbers and the same unit costs that appear on the PO. Bill the quantity actually shipped, not the quantity ordered. State the terms exactly as agreed.
Terms are where an Amazon seller's cash flow assumptions break. Amazon pays you on a cycle measured in days after the sale. A retailer pays net thirty from receipt, and net thirty means thirty days after their warehouse books the delivery, which may be a week after the truck arrived. In practice you are funding the inventory for closer to two months. Plan the production run accordingly.
Expect deductions. Retailers take money off the invoice for shortages, for late delivery, for a label that did not scan, for a carton that arrived damaged. Some of those are legitimate and some are clerical. Log every one against the PO, dispute the clerical ones quickly, and treat the rest as a cost of the channel.
What does this cost compared with an Amazon sale
Run one product through both routes and the difference becomes obvious.
| Per unit | Amazon FBA sale | Wholesale case |
|---|---|---|
| Price you receive | Retail less referral fee | Wholesale price on the PO |
| Fulfilment | One pick and pack per unit | One pick per case, split across units |
| Advertising | Ad spend to win the click | None after the account is opened |
| Cash timing | Days | Net terms from receipt |
| Returns | Customer returns, restocking | Rare, but chargebacks instead |
The wholesale line gets a much lower price and keeps a surprising amount of it, because the two biggest per-unit costs on the Amazon side — the fulfilment fee and the advertising to win the sale — mostly disappear. What replaces them is working capital and operational discipline.
Can you do this without a warehouse
For the first orders, yes, with limits.
Multi-channel fulfilment can ship units from your FBA inventory to a business address. It will not build case packs, it will not apply carton labels, and it will not follow a routing guide, so it works for small boutique reorders and fails for anything with a vendor manual. The boundary is drawn in multi-channel fulfilment for wholesale.
You can also ship from your garage for a while. Plenty of brands do. What forces the move to a 3PL is not volume, it is compliance: the first account that wants an advance ship notice and a routing request is the account your kitchen table cannot serve.
Where to start if you have no wholesale orders yet
None of this matters until someone sends you a PO, and the sequence above is worth reading precisely so you can answer confidently when one arrives rather than discovering the routing guide in the middle of a ship window.
The step before all of it is knowing who would plausibly buy. Paste your listing into WholesalePilot and the preview shows the distributors and retailers that stock products like yours, which tells you whether to invest in case packs and barcodes at all.
If the answer is yes, build in this order: a case pack that makes sense on a shelf, a licensed barcode on every variant, a 3PL that has handled retail accounts before, and a price list that survives the terms and deductions described above. That sequence has fewer dead ends than doing it in the order the first buyer happens to ask for.