Walmart EDI requirements (U.S.)
Walmart U.S. sends purchase orders by EDI and exchanges acknowledgments, advance ship notices, invoices and remittances with its suppliers, connected over AS2 and set up through Retail Link. Deliveries are measured On-Time In-Full (OTIF): 98% on time for collect orders, 90% for prepaid and 95% in full, and cases that miss are fined 3% of their cost of goods.
The documents
| Document | Direction | What it is for | Specification |
|---|---|---|---|
| 850 Purchase Order | From Walmart | The order. Each one carries its Must Arrive By Date (MABD), which OTIF is measured against. | Read and validate |
| 860 Purchase Order Change | From Walmart | A change to an order already sent. | Read and validate |
| 855 Purchase Order Acknowledgment | To Walmart | Your acknowledgment of the order: what you will ship, and when. | Read and validate |
| 856 Ship Notice/Manifest | To Walmart | The ship notice for each shipment, matching the GS1-128 labels on the cases and pallets. | Read and validate |
| 810 Invoice | To Walmart | Your invoice for what was shipped. | Read and validate |
| 820 Payment Order/Remittance Advice | From Walmart | Walmart’s payment and remittance: which invoices were paid, and the deductions taken. | Read and validate |
| 812 Credit/Debit Adjustment | From Walmart | A credit or debit adjustment to an invoice. | Read and validate |
| 824 Application Advice | From Walmart | Walmart’s report of errors in a document you sent. | Read and validate |
| 864 Text Message | From Walmart | Free-form messages from Walmart. | Read and validate |
| 846 Inventory Inquiry/Advice | To Walmart | Your inventory position, for items Walmart tracks that way. | Read and validate |
| 997 Functional Acknowledgment | Both ways | The functional acknowledgment that each document was received and could be read. | Read and validate |
Delivery and compliance targets
- OTIF: 98% of cases on time for collect orders, 90% for prepaid orders, and 95% in full. On time is measured against the order’s Must Arrive By Date.
- Delivery window: the order says how early a shipment may arrive: on the MABD itself, or up to 1, 2 or 3 days before it.
- Labels: each case carries an ITF-14 or GS1-128 barcode, on at least two sides.
- SQEP: Walmart’s Supplier Quality Excellence Program checks PO accuracy, barcodes and labelling, and packaging, pallets and loads, in phases.
Fines and allowances
| Fine or allowance | Amount |
|---|---|
| OTIF: cases not on time or not in full | 3% of the cost of goods of those cases |
| Warehouse distribution allowance (QD) | Usually 1% of the value of type 33, 83 and 93 orders |
| New store or club discount (OL) | Typically 10% of the value of the orders |
| Defective and returned merchandise allowance (DM) | A negotiated percentage of all orders |
As summarized by SPS Commerce (OTIF: updated August 14, 2025; allowances: updated July 11, 2025). Allowances are negotiated in your supplier agreement and show up as deductions on the 820; your agreement is what applies. Walmart does not publish per-document EDI chargebacks outside Retail Link.
Meeting these requirements with Weredi
Read Walmart’s specifications
11 of the documents above are published segment by segment, free, with a validator that checks your own file against them.
Build the 855, 856 and 810 from each order
Each 850 becomes your acknowledgment, ship notice and invoice without rekeying, with pallet and carton structures and SSCC labels for the 856.
See what Walmart deducted
On Weredi Plus, the deduction ledger matches each deduction on the 820 to its invoice and builds a bilingual dispute pack for the ones you contest.
One flat price
From $199 CAD a month for Walmart and every other trading partner, with unlimited transactions.
How you connect
Walmart connects suppliers over AS2, and the connection and document testing are set up in Retail Link, its supplier portal. Weredi exchanges documents over AS2 directly, without a VAN. This page covers Walmart U.S.; if you supply Walmart Canada, confirm its requirements with Walmart Canada.
Get your Walmart documents right before they ship
Start a free 14-day trial with Walmart already added, no credit card.
Questions buyers ask
What EDI documents does Walmart use with suppliers?
Walmart U.S. sends the 850 purchase order and 860 changes, and suppliers send the 855 acknowledgment, the 856 advance ship notice and the 810 invoice. Walmart pays with the 820 remittance, reports errors with the 824, and both sides exchange the 997.
What is Walmart’s OTIF fine?
Cases that are not on time or not in full are fined 3% of their cost of goods. The targets are 98% on time for collect orders, 90% for prepaid orders and 95% in full, according to SPS Commerce’s summary updated August 14, 2025.
How do I connect to Walmart by EDI?
Over AS2. The connection and the testing of each document are set up in Retail Link, Walmart’s supplier portal. Weredi exchanges documents over AS2 directly, without a VAN.
Does this page cover Walmart Canada?
No. It covers Walmart U.S., whose specifications Weredi publishes. Walmart Canada runs its own supplier program, so confirm its requirements with Walmart Canada.
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