Amazon’s YXU1 fulfillment center in St. Thomas, Ontario opened on October 1, 2023, and has quickly become one of the most strategically important nodes in Amazon Canada’s logistics network. Located at 11884 Sunset Road on the former Ford St. Thomas Assembly Plant site, the 2-million-square-foot facility processes up to 750,000 shipments per day and serves Southwest Ontario and cross-border U.S.–Canada corridors.
If Amazon has assigned a shipment of yours to YXU1, or you’re curious whether a local Ontario prep center can help reduce FNSKU errors before your inventory reaches this facility, you’re in the right place. This guide answers the most common questions FBA sellers ask about YXU1.
TL;DR
YXU1 is Amazon Canada’s robotics-enabled fulfillment center at 11884 Sunset Road, St. Thomas, ON N5P 0G9. It opened October 2023 and processes up to 750K units daily. Sellers assigned to YXU1 benefit most from having inventory prepped locally — correct FNSKU labels, proper poly bagging, and compliant carton packing reduce holds and receiving delays at this computer vision-dependent facility.
Last updated: April 2026. This page is updated as Amazon’s inbound requirements change.
What Is the Amazon Fulfillment Center in St. Thomas, Ontario?
The St. Thomas facility is known by its Amazon FC code YXU1 — the “YXU” prefix reflects the IATA code for London International Airport, the closest major airport, while the “1” indicates it’s the first facility built in this cluster. It’s a sortable fulfillment center, meaning it handles standard-sized items (books, electronics, apparel, household goods, and similar products) rather than oversized or hazmat inventory.
YXU1 is a robotics-first facility. Amazon’s Fulfilment by Amazon (FBA) program routes inventory algorithmically — sellers don’t choose which FC receives their shipment. Under Amazon Canada’s 2026 regionalization strategy, YXU1 handles demand for Southwest Ontario and relieves congestion at the older GTA-area fulfillment centers. If your buyers are in the London–Windsor–Kitchener corridor, YXU1 is increasingly likely to be your assigned inbound destination.
For a deeper look at how Amazon routes inventory across Ontario, see our guide to Amazon regional allocation in Canada.
What Is YXU1’s Address and How Do I Ship There?
YXU1’s shipping address:
Amazon.com.ca, Inc.
c/o Amazon Canada Fulfillment Services
11884 Sunset Road
St. Thomas, ON N5P 0G9
Canada
This address is used when Amazon Seller Central generates your FBA shipment labels. You don’t type it in manually — Seller Central produces box-level labels once you create a shipment plan. Each carton label includes the FC code (YXU1), a shipment ID, and a carton barcode.
- St. Thomas is approximately 30 km south of London, ON and 180 km southwest of Toronto
- Highway 401 provides direct freight access from Toronto, the U.S. border at Windsor, and points east
- Cross-border freight from the U.S. via Windsor–Detroit typically reaches YXU1 within 1–3 business days
- Domestic ground freight from Toronto to YXU1 is typically 1 business day
Our experience: We receive removal order inventory daily from YXU1 at our St. Thomas prep center — transit from Amazon’s dock to our facility is under 30 minutes, which means relabeled inventory can be back in an FBA shipment within 24–48 hours of arrival.
What Does Amazon Require Before Sending Inventory to YXU1?
YXU1 is a next-generation, robotics-enabled facility that uses computer vision to read barcodes and scan cartons. Label quality and placement matter more here than at older, manually-sorted facilities. Amazon’s inbound requirements apply to all FBA fulfillment centers, but non-compliant inventory is caught faster at automated facilities like YXU1.
| Requirement | Specification |
|---|---|
| FNSKU label | 1″ × 2.625″, black ink on white, matte finish, covers original barcode |
| Carton label | Printed from Seller Central; one per face, visible, unobstructed |
| Poly bag (suffocation hazard items) | Clear, 1.5 mil minimum, suffocation warning if opening ≥ 5″ |
| Expiration date | Must be on unit and outer case for any perishable or consumable |
| Carton weight | 50 lbs maximum (single-item cartons over 50 lbs need “Team Lift” label) |
| Carton dimensions | No side over 25″ unless in the oversized category |
As of March 31, 2026, Amazon discontinued commingled inventory for resellers. Every unit entering any FBA fulfillment center — including YXU1 — must carry an FNSKU label. Manufacturer barcodes alone are no longer accepted for resellers. Our post on the FNSKU labeling deadline for Ontario sellers walks through the exact label spec and compliance steps.
For a complete walkthrough, see what Amazon Canada inbound prep actually requires.
Why Do Sellers Use a Prep Center Near YXU1?
FBA sellers use a local Ontario prep center for three main reasons: catching compliance issues before they become Amazon holds, reducing transit time between prep and the FC, and handling removal order inventory without shipping it across the border.
1. FNSKU errors get caught before they reach the FC
YXU1’s computer vision systems flag mislabeled, bent, or low-contrast FNSKU labels at the receiving dock. When Amazon rejects a unit, it either goes into a hold or gets returned. A local prep center inspects every unit before it ships, catching bad labels when they’re cheap to fix — not after they’ve traveled to the FC.
2. Removal orders resolve faster
When Amazon returns inventory from YXU1 via a removal order, it arrives at a local address within 7–21 days of processing. If your return address is overseas or in the U.S., you’re adding customs, cross-border freight, and time. Routing removal orders to a St. Thomas prep center means relabeled inventory can re-enter FBA within days, not weeks. Our FBA removal and relabeling service in Ontario is specifically designed for sellers whose inventory routes through YXU1 and nearby Ontario FCs.
3. Inventory enters the network prepped correctly the first time
A prep center near YXU1 isn’t just a convenience — it’s a structural advantage. Sellers who prep locally send compliant cartons on the first attempt, avoiding the receiving delays and surprise fees that come with non-compliant inbound shipments. Working with a Canadian Amazon prep center in St. Thomas means your inventory is prepped, labeled, and shipped from the same city as the FC receiving it.
Are There Known Issues or Delays at YXU1?
YXU1 has experienced receiving backlogs during peak periods, as reported by sellers in Amazon’s Seller Forums. Peak-season inventory surges create delays at most Canadian FCs, but YXU1’s robotics-driven sorting process has less tolerance for non-compliant inventory than older facilities.
Common reasons inventory gets delayed at YXU1:
- FNSKU labels that are wrinkled, placed on a curved surface, or positioned over a seam
- Carton labels that are obscured by packing tape
- Mixed ASINs in a single-ASIN carton (violates case-pack rules)
- Units not individually bagged where Amazon requires poly bagging
If your inventory is showing a long “receiving” status at YXU1, check your Shipment Summary in Seller Central and look for any “Problem Units” flags. Our guide on Amazon Canada FC decisions — inbound, returns, and removal covers the options available once inventory is in the FC.
Frequently Asked Questions About YXU1
What is the full address of Amazon YXU1?
Amazon YXU1 is located at 11884 Sunset Road, St. Thomas, ON N5P 0G9, Canada. It sits in the Talbotville area on the former Ford Motor Company assembly plant site, approximately 30 km south of London, Ontario. The facility opened October 1, 2023 and spans approximately 2 million square feet.
Does Amazon YXU1 accept oversized inventory?
YXU1 is a sortable fulfillment center optimized for standard-sized items — products whose longest side is 18 inches or less and total weight is 20 lbs or less. Oversized inventory is typically routed to separate non-sortable FCs. Amazon’s algorithm assigns your specific ASINs to compatible FCs based on their size tier.
Can I choose to send inventory to YXU1 specifically?
No. Amazon assigns fulfillment centers during the shipment creation process in Seller Central. FBA sellers cannot manually select which FC receives their inventory. If you’re on the Inventory Placement Service (IPS), your shipment may consolidate to fewer FCs, but the selection remains Amazon’s.
What happens if my inventory arrives at YXU1 with the wrong label?
Amazon will flag non-compliant units as “Problem Units” in your Shipment Summary. You can authorize Amazon’s labeling service (available at some FCs, at a per-unit fee) or request a removal order to have the inventory returned. Having inventory prepped by a local Ontario prep center before shipping eliminates this risk entirely.
Is MoRo Prep close to YXU1?
Yes. MoRo Prep is located in St. Thomas, Ontario — the same city as YXU1. Removal order inventory from YXU1 reaches our facility in under 30 minutes, and relabeled inventory can return to the FBA network within 24–48 hours of arrival. Learn more at our Amazon prep center page.
Related Resources
- YXU1: Amazon Canada’s Regional Fulfillment Center — Full breakdown of YXU1’s role in Amazon’s 2026 regionalization strategy and what it means for inventory routing decisions.
- Amazon Regional Allocation in Canada — How Amazon’s algorithm decides which FC gets your inventory, and what triggers assignment to YXU1.
- FNSKU Labeling After March 31, 2026 — Exact label specifications, compliance steps, and what happens to non-compliant inventory at robotics-enabled FCs.
- FBA Removal and Relabeling in Ontario — How removal orders from YXU1 work and how a St. Thomas prep center reduces the relabeling cycle to 24–48 hours.
- Amazon Seller Central — FBA Canada Overview — Official Amazon resource covering FBA fees, requirements, and inbound policies for Canadian sellers.
Still Have Questions About Shipping to YXU1?
If your inventory is regularly assigned to YXU1 and you’re dealing with labeling errors, removal orders, or inbound delays, contact MoRo Prep directly. We’re based in St. Thomas, Ontario — the same city as YXU1 — and we work with FBA sellers across Canada and internationally. Visit our Amazon prep center page to see our full service list or reach out to discuss your specific situation.