If you fulfill your own Amazon orders, the way you handle returns is about to change. Starting December 18, 2026, US returns on seller-fulfilled orders need a prepaid return label. The requirement applies to everything except heavy and bulky items. This post covers what the rule says, what it means for your margins and daily routine, and a checklist to get ready before the date arrives.
What changes, and when
Here is the rule as Amazon has described it to sellers:
- Start date: December 18, 2026.
- Scope: All US returns on seller-fulfilled (FBM) orders, except heavy and bulky items.
- Address-only labels no longer count. If you currently give customers a return address and let them pay for shipping, that will not meet the requirement.
- Heavy and bulky items are temporarily exempt.
- You have 7 calendar days. Within 7 calendar days of a return request, you must either upload a prepaid label in the “Manage seller-fulfilled returns” workflow, or issue a full refund without requiring the item back.
- If you do neither, Amazon may issue a returnless refund automatically and deduct it from your account.
- Labels sent any other way don’t count. A label shared through Buyer-Seller Messaging, or through any channel outside the Manage Returns workflow, does not satisfy the requirement.
Before you change your process, confirm the details for your account in Seller Central.
The practical effect is simple: every eligible return request now needs a decision and an action inside Amazon’s workflow within a week. A request that sits in a queue unnoticed can turn into a refund you didn’t choose, deducted from your account.
A seller’s checklist for the prepaid label rule
1. Budget return-label cost into FBM margins, per SKU
Because address-only labels where the customer pays no longer meet the requirement, return shipping becomes a cost you need to plan for. Don’t treat it as a single store-wide number. A small, light item and a larger, heavier one will cost very different amounts to ship back.
For each SKU, look at:
- What a prepaid return label is likely to cost for that item’s size and weight.
- How often that SKU gets returned.
- What it costs to receive, inspect, and repackage a returned unit.
Add the expected return cost to your per-unit cost, then check whether the SKU still earns the margin you need. Some SKUs will absorb it easily. Others may need a price change, a packaging change, or a different returns approach, which leads to the next step.
2. Set a returnless-refund threshold for low-priced SKUs
The rule gives you two options for each request: send a prepaid label, or refund in full without asking for the item back. For some products, the second option is the cheaper one.
The logic works like this. Compare two numbers for each SKU:
- Cost to get it back: the return label, plus the handling cost to receive, inspect, and restock or dispose of the unit.
- Recoverable value: what you can realistically get from the returned unit once it’s back. That depends on how often returns of that SKU arrive in sellable condition and what you can resell them for.
If the cost to get it back is higher than the recoverable value, asking for the item back loses money. For those SKUs, a returnless refund is usually the better call.
Example (illustrative only, no real figures): say a SKU’s return label plus handling costs more than the amount you would typically recover by reselling the unit. Even when the unit comes back in perfect condition, you end up behind. That SKU belongs below your returnless-refund threshold.
Set the threshold deliberately, write it down, and review it when label costs, prices, or return rates change. That way your team isn’t deciding case by case, and you’re not leaving the decision to an automatic refund.
3. Build a 7-day workflow so no request lapses
Seven calendar days goes quickly, especially across weekends and holidays. Set the process up before December 18, not after.
A workable routine:
- Assign an owner. One named person checks “Manage seller-fulfilled returns” in Seller Central every day. Name a backup for days off.
- Decide on each request right away. Use your SKU list from step 2: returnless refund, or prepaid label.
- Upload labels in the workflow. Prepaid labels go into “Manage seller-fulfilled returns,” not into Buyer-Seller Messaging or email. Labels sent outside the workflow don’t count.
- Track open requests by age. A simple list of requests and the day each one arrived makes it obvious which ones are getting close to the 7-day limit.
- Check weekends. The limit is in calendar days, so a request that comes in Friday still has the clock running through Saturday and Sunday.
If more than one person or team touches returns, write the steps down so everyone follows the same process.
4. Route returns to a warehouse that can inspect, grade, and restock fast
Once you’re sending prepaid labels, you’re paying to get those units back. That money is only worth spending if sellable units get back on the shelf quickly.
The return address on your labels should be a location that can:
- Receive returns and match them to the original order.
- Inspect and grade each unit: sellable, needs repackaging, or damaged.
- Restock sellable units into available inventory.
- Flag damaged units so you can decide what to do with them.
- Show you the results, so your inventory counts stay accurate.
If returns land in a garage, a back office, or a warehouse that batches them for weeks, the stock you paid to recover sits idle while you may be reordering the same items.
How ShipDepot helps FBM sellers with returns
ShipDepot is a third-party logistics (3PL) provider that handles FBM order fulfillment and returns processing for ecommerce sellers.
For returns, our team receives returned units, inspects them, and restocks sellable items or flags damaged ones. Your inventory is visible in our WMS, so you can see what came back and what’s available to sell.
Our own warehouse is in Palmdale, in Southern California, and it’s part of a 5-location US fulfillment network. We ship up to 20,000 orders a day and have served more than 150 FBA clients.
Every seller’s catalog and Seller Central setup is different, so we don’t hand out a one-size-fits-all process. We can set up a returns workflow with you that fits your SKUs, your returnless-refund threshold, and how your team handles the Manage Returns queue.
If you also sell through FBA and need to pull inventory out of Amazon’s warehouses, we handle Amazon removals too.
Get ready before December 18
The prepaid label rule doesn’t have to be a headache, but it does need a plan: know your per-SKU return costs, decide which SKUs get a returnless refund, make sure someone checks Manage Returns every day, and send returns somewhere that gets sellable units back into stock.
If you’d like help with returns, get a quote, call us at 818-510-1499, or email info@shipdepot.com.