Managed EDI for Walmart suppliers
Walmart EDI. Your wholesale orders, processed by our team.
Shipping wholesale merchandise to Walmart takes coordinated orders, packing information and electronic documents. Roundhouse does the EDI data entry and processing: we translate purchase orders, prepare ASNs and shipping labels, and send approved invoices. Your team handles the products; we handle the EDI.
Let’s talk about your EDI
What is Walmart EDI?
Walmart EDI is the electronic exchange of standardized business documents between Walmart and its suppliers. A purchase order tells the supplier what to fulfill, an advance ship notice describes the shipment, and an invoice requests payment. Roundhouse handles this document flow for wholesale suppliers using our own systems and experienced processing team.
Built for suppliers shipping merchandise in volume.
We work with wholesale businesses preparing cartons and pallets for retail distribution. Our service centers on the supplier purchase order and the actual shipment leaving your warehouse. We establish the Walmart program, vendor account and document requirements during setup so the processing follows your wholesale relationship.
- Receive readable purchase orders your staff can review and fulfill.
- Provide actual packed quantities, carton or pallet details and shipment references.
- Review the ASNs, labels and invoices our team prepares.
- View purchase orders and download PDF copies in our customer portal.
Walmart EDI documents and shipping labels.
These documents cover the core order-to-invoice service and related feedback. Walmart specifically lists the six X12 transactions below for its DSDC program. We confirm the required set and maps for your own wholesale account; the DSDC list is not a universal requirement for every Walmart supplier.
| Code / format | Document | What we handle |
|---|---|---|
| 850 | Purchase Order | Receive and translate the order, preserving vendor, item, quantity and destination references for fulfillment. |
| 856 | Advance Ship Notice (ASN) | Prepare the shipment notice from actual packing and shipping information, including the applicable logistics-unit identifiers. |
| GS1-128 | Shipping label / SSCC-18 identifier | Prepare the applicable shipping labels and align their logistics-unit identifiers with the ASN. GS1-128 is a barcode format, not an X12 transaction. |
| 810 | Invoice | Prepare and transmit the approved invoice using the purchase order and shipped quantities. |
| 824 | Application Advice | Review application-level feedback when used by the account and work through reported document issues. |
| 864 | Text Message | Review EDI text notifications included in the agreed workflow and identify issues requiring follow-up. |
| 997 | Functional Acknowledgment | Handle structural acknowledgment of EDI transactions; this does not confirm merchandise receipt or payment approval. |
Keep vendor accounts and destinations distinct.
A large shipment can involve several purchase orders, destination references or vendor accounts. Roundhouse keeps those relationships connected to the documents being prepared. Walmart’s DSDC guidance specifically requires separate handling of distinct vendor numbers. For accounts using that program, we build the document workflow around those distinctions rather than combining unrelated order information.
DSDC: the ASN supports the move from distribution center to store.
Walmart’s DSDC process requires an ASN for each order to support receiving and onward shipment to stores from the regional distribution center. When your account uses DSDC, Roundhouse prepares the notice using the applicable map and your shipment details. We review the program-specific requirements during setup, including the information your warehouse must provide.
A product barcode and a shipping identifier do different jobs.
A GTIN identifies a trade item; an SSCC identifies a logistics unit such as a case or pallet. Sending an ASN does not replace the required product identification on the merchandise. Roundhouse prepares the applicable GS1-128 shipping labels and keeps shipment identifiers aligned with the ASN. Your warehouse remains responsible for correct physical labeling, packing and loading.
Reduce document errors before the shipment arrives.
Missing, late or invalid ASNs can create receiving problems. Our team coordinates document preparation with your shipping information, checks order and quantity consistency, and reviews the EDI feedback in your workflow. This helps reduce EDI-related chargebacks. Physical delivery performance, packaging and carrier appointments remain separate responsibilities; EDI alone does not guarantee on-time, in-full delivery.
We manage setup and the daily processing that follows.
Roundhouse has been helping companies stay EDI compliant for over 20 years. We review the applicable Walmart account and connection requirements, coordinate setup and testing, and establish how your team will provide packing details and approvals. Our team then does the ongoing EDI work. There is no EDI software for you to buy or learn.
Changing providers without losing track of open orders.
Before taking over processing, we review outstanding orders, ASNs and invoices and agree which provider will handle each remaining transaction. We also establish how new orders and reported errors will be handled during the transition. That gives your team a clear division of work as processing moves to Roundhouse.
Frequently asked questions
Walmart EDI support
What is EDI in Walmart?
EDI means Electronic Data Interchange. Walmart and its suppliers use standardized electronic documents to exchange orders, shipment notices, invoices and related information. Roundhouse processes those documents for wholesale suppliers.
What EDI does Walmart use?
Walmart uses transaction sets such as the 850 purchase order, 856 advance ship notice and 810 invoice. The required documents, maps and connection settings depend on the supplier program. We confirm those requirements for your wholesale account during setup.
Do you do the Walmart EDI work for us?
Yes. We receive and translate orders, handle shipment data entry, prepare labels and ASNs, and transmit approved invoices using our systems. Your staff provides actual shipment information and document approvals.
Can you help with Walmart DSDC orders?
Yes. We review your DSDC account requirements and prepare the required EDI documents, including the ASN that supports receiving and shipment to stores. Vendor numbers and order references are kept distinct.
Do we still need product barcodes when sending an ASN?
Yes. Product identification and shipment identification serve different purposes. An ASN and SSCC shipping label do not replace the applicable GTIN and physical case-marking requirements.
Do you provide Walmart shipping labels?
Yes. We prepare the applicable GS1-128 shipping labels using logistics-unit identifiers aligned with the ASN and your packing information. Your warehouse applies the labels to the correct cases or pallets.
Can you help reduce Walmart EDI-related chargebacks?
Yes. We help reduce EDI-related chargebacks through accurate order references, consistent shipment data, coordinated document transmission and follow-up on reported EDI issues.
Can we view our Walmart purchase orders online?
Yes. You can view your purchase orders and download them as PDF files in our customer portal.
How do we get started with Walmart EDI?
Contact Roundhouse. We guide you through account review, setup and testing, then handle your ongoing wholesale EDI processing.
Use the current instructions for your vendor account when setting up or changing an EDI connection. Retailer names identify the accounts we support; these pages are published by Roundhouse, Inc.
Let’s talk EDI