Walmart EDI Integration – Complete Guide for Suppliers & Vendors
Walmart EDI integration is essential for suppliers aiming to streamline operations, ensure compliance, and avoid costly chargebacks. As one of the largest retailers in the world, Walmart requires suppliers to exchange critical business documents such as purchase orders, invoices, and advance ship notices (ASN) through a standardized Electronic Data Interchange (EDI) system.
A fully integrated Walmart EDI solution enables automated workflows, real-time data exchange, improved accuracy, and faster order processing—helping suppliers meet strict compliance requirements while scaling efficiently.
What is Walmart EDI?
Walmart EDI (Electronic Data Interchange) is a standardized system that allows suppliers to electronically exchange business documents with Walmart. Instead of manual processes such as emails or spreadsheets, EDI automates communication between systems, ensuring speed, accuracy, and reliability.
- Automated purchase order processing
- Real-time shipment tracking and visibility
- Faster invoicing and payment cycles
- Reduced manual errors and operational costs
- Improved supplier compliance and performance
Walmart EDI Integration: Why It Matters for Suppliers
Walmart EDI integration allows suppliers to automate document exchange, reduce operational inefficiencies, and maintain compliance with Walmart’s strict supply chain requirements. With increasing pressure on suppliers for speed and accuracy, EDI ensures seamless communication and faster fulfillment.
Suppliers benefit from improved visibility, reduced chargebacks, and scalable operations—making EDI a critical requirement for long-term success with Walmart.
Mandatory Walmart EDI Documents
To remain compliant, suppliers must support the following Walmart EDI transaction sets:
- EDI 850 – Purchase Order
- EDI 855 – Purchase Order Acknowledgment
- EDI 856 – Advance Ship Notice (ASN)
- EDI 810 – Invoice
- EDI 997 – Functional Acknowledgment
- EDI 820 – Payment Remittance
- EDI 864 – Text Message
| EDI Code |
Document Name |
Purpose |
| EDI 850 |
Purchase Order |
Order issued by Walmart |
| EDI 855 |
Purchase Order Acknowledgment |
Order confirmation or changes |
| EDI 856 |
Advance Ship Notice (ASN) |
Shipment and carton-level details |
| EDI 810 |
Invoice |
Billing Walmart for goods shipped |
| EDI 997 |
Functional Acknowledgment |
Confirms receipt of EDI documents |
| EDI 820 |
Payment Remittance |
Payment details from Walmart |
| EDI 864 |
Text Message |
Special instructions or notifications |
Walmart EDI Compliance Requirements
Walmart enforces strict EDI compliance standards to maintain efficiency across its supply chain. Suppliers must adhere to the following requirements:
- Timely and accurate ASN submission before shipment arrival
- GS1-128 (UCC-128) compliant carton labeling
- Accurate item, pricing, and quantity data
- Successful EDI testing and certification
- Consistent and error-free document transmission
Failure to meet Walmart EDI compliance requirements can result in chargebacks, shipment delays, payment issues, and supplier performance penalties.
Common Walmart EDI Challenges
- Complex EDI mapping and data validation requirements
- ASN timing errors and labeling mismatches
- Manual data entry leading to inaccuracies
- ERP and WMS integration difficulties
- High risk of chargebacks due to compliance failures
How Walmart EDI Integration Works
- Walmart sends an EDI 850 Purchase Order
- Supplier responds with EDI 855 Acknowledgment
- Shipment is prepared and EDI 856 ASN is transmitted
- Supplier sends EDI 810 Invoice
- Walmart processes payment via EDI 820 Remittance
Walmart EDI Integration Options
1. Walmart Retail Link (Manual Process)
Best suited for low-volume suppliers but lacks scalability and increases the risk of manual errors.
2. Third-Party Walmart EDI Provider (Recommended)
Automated EDI workflows integrated with ERP systems, ensuring accuracy, scalability, and full compliance.
3. In-House EDI System
Requires significant technical expertise, infrastructure, and ongoing maintenance, making it costly in the long run.
ERP Systems Supported for Walmart EDI
Walmart EDI Chargebacks and How to Avoid Them
Common causes of Walmart EDI chargebacks include:
- Late or missing ASN submissions
- Incorrect or non-compliant carton labeling
- Quantity or pricing discrepancies
- Invalid or incomplete invoice data
Using an automated Walmart EDI solution with real-time validation and monitoring significantly reduces chargeback risks and improves supplier performance.
Walmart EDI Onboarding Timeline
- Day 1–2: Requirement analysis and mapping
- Day 3–5: EDI setup and ERP integration
- Day 5–7: Testing and validation
- Go-Live: Fully compliant Walmart EDI operations
Walmart EDI vs Manual Processing
- Manual: Slow, error-prone, and not scalable
- EDI: Automated, accurate, and real-time
Benefits of a Managed Walmart EDI Solution
- Faster onboarding and implementation
- Reduced operational and infrastructure costs
- Improved data accuracy and compliance
- Scalable solution for multi-retailer environments
- Dedicated EDI support and monitoring
Proven Walmart EDI Expertise
At Cogential IT, we have helped suppliers successfully implement Walmart EDI integration with fast onboarding, accurate mapping, and zero compliance errors. Our solution reduces chargebacks, improves efficiency, and ensures seamless communication with Walmart systems.
