What EDI documents does Walmart require?

Most Walmart supplier programs center on order-to-cash X12 sets — typically 850 purchase orders, 855 acknowledgments, 856 advance ship notices, and 810 invoices. Additional sets vary by category; confirm against your Retail Link implementation guide.

How long does Walmart EDI onboarding take?

Industry averages land around 4–8 weeks, but timelines depend on test cycles, DC routing, and exception handling in Retail Link. SignalEDI helps your team get technically ready in days, not weeks while the retailer controls certification approval.

Can SignalEDI help avoid retailer chargebacks?

SignalEDI validates ASN, PO reference, and invoice alignment before files leave your control — catching mismatches early reduces the chargeback exposure common on high-volume retail programs.

Retailer EDI requirements

Walmart EDI requirements

ANSI X12 4010/5010 · AS2 (mandatory) · Portal: Retail Link · Typical onboarding: 4–8 weeks

Start free trial All 24 retailers

Walmart-specific compliance context

Retail Link is the vendor portal for certification and day-to-day compliance visibility.
Typical onboarding window: 4–8 weeks before production cutover (partner-controlled).
High chargeback exposure when ASN, invoice, or label rules drift.

Core EDI documents

Code	Document	Direction	Notes
850	Purchase Order	Inbound	Foundation of every Walmart transaction
855	PO Acknowledgment	Outbound	Must respond within 24 hours
856	Advance Ship Notice	Outbound	Must be sent before shipment arrives — most chargeback-prone document
810	Invoice	Outbound	Must reconcile with 850 and 856

Compliance requirements

GS1/GTIN compliant product identification (UPC barcodes)
GS1-128 shipping labels with SSCC codes
AS2 security certificates must be exchanged before testing
Certification testing required before go-live
OTIF (On-Time In-Full) scorecard tracked in Retail Link
Web EDI available for very low-volume suppliers only

Supplier programs & chargeback risk

Programs: Domestic, Direct Import, DSD, Marketplace

Chargeback exposure: High — automated chargebacks for ASN errors, late shipments, and invoice mismatches

Trading partner profile

See mandate context, connectivity options, and onboarding steps on the Walmart trading partner page.

Trust & proof

Built for SMB teams that need API-first EDI, healthcare diligence, and predictable pricing.

SignalEDI keeps the public promise consistent across every route: real-time processing, transparent monthly plans, no per-document fees, QuickBooks-friendly handoffs, and core healthcare X12 workflows on paid plans.

HIPAA-aware handlingBAA path documentedSecure API + webhooksNo per-document fees

Operations teams

“A supplier operations team can see partner setup, validation, exceptions, and QuickBooks handoff in one workspace instead of chasing spreadsheets.”

Healthcare billing

“837, 835, and 270/271 workflows are explained in plain English, with HIPAA-aware handling and a documented BAA review path for diligence.”

Developer teams

“JSON/CSV in and X12 out, with API docs, webhooks, real-time status, and validation responses that make EDI feel like modern infrastructure.”

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