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Walmart EDI Integration: Get Compliant with Vantree

Vantree provides a fully managed Walmart EDI integration service that covers every phase of the compliance process, from AS2 connection setup and document mapping through to OTIF monitoring and chargeback prevention. Whether you are onboarding as a new Walmart supplier or scaling operations across multiple divisions, our team handles the technical complexity so you can focus on getting your products onto Walmart shelves.

With over 25 years of EDI expertise and SOC 2 Type 2 certification, Vantree is trusted by suppliers who trade with the world's largest retailers.

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About Walmart

Walmart Inc., founded in 1962 by Sam Walton in Bentonville, Arkansas, is the world’s largest retailer by revenue. The company operates more than 11,400 stores worldwide across 19 countries, employs over 2.2 million people, and generates annual revenue exceeding $600 billion. In the United States, Walmart runs supermarkets, grocery stores, discount department stores, and hypermarkets under multiple banners. The company also operates Sam’s Club warehouse stores and Walmart Marketplace, a growing third-party seller platform on Walmart.com.

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For any supplier looking to sell products through Walmart stores, Sam’s Club, or Walmart.com, electronic data interchange is a fundamental requirement. Walmart pioneered the use of EDI in retail and continues to enforce some of the most demanding compliance standards in the industry. Working with an experienced EDI provider who understands Walmart’s specific protocols, document requirements, and performance programs is essential for protecting your margins and maintaining your supplier relationship.

Walmart EDI Requirements for Suppliers

Walmart uses three primary EDI document standards: ANSI ASC X12, UCS (Uniform Communication Standard), and VICS (Voluntary Inter-Industry Commerce Standard). All suppliers must be capable of exchanging business documents electronically in the formats Walmart specifies.

The mandatory communication protocol is EDIINT AS2 (Applicability Statement 2), which transmits EDI documents securely over the internet. Walmart’s guidelines state that any supplier processing more than 5,500 invoices per year must use AS2 for all EDI transactions. Suppliers below this threshold have the option to use Walmart’s browser-based WebEDI portal instead. Vantree manages AS2 and SFTP protocol configuration on your behalf regardless of your volume level.

Walmart switched from traditional VANs to AS2 in 2002 to reduce costs, improve security, and standardize supplier communication. AS2 encrypts data at the sender’s end and provides delivery receipts, making it one of the most secure EDI protocols available.

Before trade can begin, every Walmart supplier must complete these foundational steps:

  1. Apply to become a Walmart supplier and receive a unique supplier number
  2. Obtain a GS1 Company Prefix from GS1, which is required for all product identification (GTINs, barcodes)
  3. Register on Retail Link, Walmart’s supplier portal for sales data, compliance scorecards, item management, and financial information
  4. Choose an EDI provider such as Vantree and establish the AS2 connection
  5. Configure document mapping, translation, and validation for each required transaction set
  6. Complete EDI testing and certification
  7. Begin receiving purchase orders and transmitting invoices, ASNs, and other documents

Suppliers who opt for WebEDI (Walmart’s own browser-based portal for low-volume vendors) should note that Walmart expects suppliers to remain on WebEDI for at least one year before requesting a switch to traditional EDI. WebEDI supports multiple supplier numbers within the same Walmart region, but separate mailboxes are required for supplier numbers in different regions.

Walmart relies on an extensive set of EDI document types to manage its global supply chain. Suppliers must support the core required documents and may need additional transaction sets depending on their product category, fulfillment model, and supply chain program.

The primary Walmart EDI transaction sets include:

  • EDI 850 (Purchase Order): Walmart sends this to initiate an order with item details, quantities, pricing, ship dates, delivery locations, and the Must Arrive By Date (MABD)
  • EDI 855 (Purchase Order Acknowledgment): Suppliers confirm receipt and acceptance of the purchase order
  • EDI 856 (Advance Ship Notice / ASN): Suppliers send detailed shipment information before delivery, including GS1-128 compliant barcode labels and carton-level identification
  • EDI 810 (Invoice): Suppliers submit this to request payment, referencing the original purchase order number with matching line items
  • EDI 812 (Credit/Debit Adjustment): Walmart issues this for chargebacks, pricing adjustments, or deductions
  • EDI 820 (Payment Order/Remittance Advice): Walmart sends remittance details for payments processed
  • EDI 824 (Application Advice): Communicates errors, corrections, or acceptance of previously transmitted documents
  • EDI 846 (Inventory Advice): Provides real-time inventory updates to Walmart, helping maintain optimal stock levels
  • EDI 852 (Product Activity Data): Transmits POS data and sales reports used for demand forecasting and replenishment
  • EDI 860 (Purchase Order Change Request): Reflects changes to an original purchase order
  • EDI 864 (Text Message): Walmart uses this for real-time urgent notifications, including invoice rejections and critical compliance alerts
  • EDI 997 (Functional Acknowledgment): Required for all inbound transactions to confirm receipt and acceptance

An accepted EDI 997 only confirms that the document had no format errors. Suppliers must separately verify through Retail Link that invoices were accepted by Walmart Accounts Payable. If an EDI 864 rejection is received, the supplier must correct and resubmit the invoice.

Walmart operates the most rigorous supplier compliance framework in retail, built around two core programs: OTIF (On-Time In-Full) and SQEP (Supplier Quality Excellence Program). Both are tracked through the compliance scorecard in Retail Link and directly impact your financial performance as a supplier.

OTIF (On-Time In-Full) measures whether shipments arrive within the designated delivery window and contain the correct quantities:

  • On-Time: Did the shipment arrive within the MABD (Must Arrive By Date) window? Delivery windows vary by department, ranging from the exact MABD date to MABD minus 2 days
  • In-Full: Did the shipment contain exactly the quantities ordered on the purchase order?
  • Threshold: Walmart expects approximately 98% OTIF compliance
  • Penalty: OTIF failures trigger chargebacks of 3% of the affected order value, measured monthly
  • Freight categories: Prepaid suppliers manage the entire shipment lifecycle and bear full OTIF responsibility. Collect suppliers hand off transportation to Walmart but must be “Collect Ready” with goods picked, packed, and staged on time

SQEP (Supplier Quality Excellence Program) covers PO accuracy, labeling compliance, packaging standards, and documentation. Walmart may audit suppliers for SQEP compliance at any time.

Additional penalty triggers include:

  • ASN errors ($50 to $500 per incident depending on severity)
  • Labeling violations ($25 to $200 per violation)
  • Routing guide non-compliance resulting in transportation chargebacks
  • Persistent non-compliance can result in reduced orders, removal from supplier programs, or termination

OTIF is not “set and forget.” Walmart monitors supplier performance continuously, and even established suppliers must track their scorecards monthly to prevent patterns that trigger escalating penalties.

Suppliers can dispute invalid chargebacks through Retail Link’s dispute process within a 30-day window. Vantree helps you identify, document, and respond to frivolous deductions before they impact your bottom line.

How Vantree Handles Your Walmart EDI Integration

When you choose Vantree as your EDI provider for Walmart, we manage every aspect of the integration on your behalf. Our fully managed service covers AS2 connection setup, document mapping, compliance monitoring, and OTIF performance tracking so you can focus on selling rather than troubleshooting EDI errors.

Vantree’s team-based support model assigns dedicated solution agents to your account. Unlike providers that rely on anonymous support tickets, our agents understand your business and work with you continuously. Here is what our managed service covers for Walmart EDI:

  1. AS2 connection setup: We establish and configure the EDIINT AS2 connection to meet Walmart’s protocol requirements, including encryption and delivery receipts
  2. Document mapping and testing: We perform the full EDI documentation map for every required transaction set and complete Walmart’s certification process
  3. Retail Link coordination: We help you navigate Retail Link setup and ensure your EDI transactions align with your supplier number and account configuration
  4. Go-live support: We present an implementation plan to meet your compliance deadlines and ensure purchase orders flow correctly from day one
  5. OTIF monitoring: We track your EDI transactions in real-time to catch ASN timing issues, quantity mismatches, and invoice errors before they trigger chargebacks
  6. Chargeback dispute support: We help you identify invalid deductions and prepare documentation for Retail Link disputes within the 30-day window

Vantree integrates Walmart EDI directly with your existing business systems, eliminating manual data entry and reducing the risk of human error. Our proprietary software connects with 35+ ERP integrations, allowing purchase orders, invoices, ASNs, and inventory data to flow automatically between Walmart and your accounting or warehouse system.

Popular ERP integrations for Walmart suppliers include SAP, Microsoft Dynamics 365 Business Central, QuickBooks, NetSuite, and Acumatica. Vantree also supports connections to WMS platforms and third-party logistics providers for suppliers who outsource warehousing and fulfillment. This is particularly important for Prepaid suppliers whose OTIF scores depend on carrier and 3PL performance.

Our cloud-based platform supports EDI, API, web services, XML, and JSON formats, ensuring compatibility regardless of your system architecture.

Vantree offers two primary solutions depending on the size and complexity of your operation:

  • Web EDI: A browser-based, cost-effective solution ideal for smaller suppliers or those below the 5,500-invoice threshold. Unlike Walmart’s own WebEDI portal (which locks suppliers in for one year), Vantree’s Web EDI is a fully managed service with dedicated support, error monitoring, and the flexibility to upgrade at any time.
  • EDI Automation: A fully integrated solution that connects EDI directly to your ERP or accounting system via AS2. Documents are exchanged automatically with no manual intervention. This option is scalable and designed for high-volume suppliers, drop ship vendors on Walmart.com, and businesses trading with both Walmart retail and Walmart Marketplace.

Both solutions include full mapping, translation, validation, and transmission services. Vantree also supports Sam’s Club EDI requirements, which operate as a separate business with distinct supplier specifications.

Why Walmart Suppliers Choose Vantree

Walmart’s compliance requirements are the most demanding in retail. Suppliers need an EDI provider that delivers accuracy, proactive OTIF monitoring, and rapid issue resolution. Vantree has built its reputation on exactly that:

  • Trusted EDI solutions provider since 1994 with over 1,000 implementations completed with no delays
  • SOC 2 Type 2 certified, ensuring your data is handled with the highest security standards
  • Team-based support with dedicated solution agents available for real-time issue resolution
  • Pre-built connections to major retailers including Target, Kroger, Costco, Amazon, and many more across our trading partner network
  • Proactive OTIF and ASN monitoring to prevent chargebacks before they hit your account
  • 24/7 transaction logging with automated error notification for visibility into every document exchange
  • Chargeback dispute assistance to recover invalid deductions and protect your margins

Vantree is not just an EDI connection. We act as an extension of your team, handling AS2 setup, compliance updates, OTIF tracking, and trading partner management so you can stay focused on growing your Walmart business and improving efficiency across your supply chain.

data interchange throughout supply chain

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Ready to become Walmart EDI compliant? Our team will handle your AS2 connection, document mapping, and OTIF monitoring so you can start trading with confidence.

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Frequently Asked Questions About Walmart EDI

What EDI documents does Walmart require?

At minimum, Walmart requires suppliers to support EDI 850 (Purchase Order), EDI 855 (Purchase Order Acknowledgment), EDI 856 (Advance Ship Notice), and EDI 810 (Invoice). Depending on your supply chain program, Walmart may also require EDI 846 (Inventory Advice), EDI 852 (Product Activity Data), and EDI 860 (Purchase Order Change). All transactions must be acknowledged with an EDI 997 Functional Acknowledgment, and suppliers should monitor EDI 864 Text Messages for invoice rejections and compliance alerts.

Walmart mandates EDIINT AS2 as the communication protocol for all suppliers processing more than 5,500 invoices per year. AS2 provides encrypted, internet-based document transmission with delivery receipts. Suppliers below the 5,500-invoice threshold can use Walmart’s browser-based WebEDI portal or connect through an approved VAN. Vantree configures the appropriate protocol for your volume level and manages the connection on your behalf.

Retail Link is Walmart’s supplier portal and the command center for your Walmart business. While EDI handles the automated exchange of documents such as purchase orders, ASNs, and invoices, Retail Link provides the user interface for monitoring your performance. Through the portal, suppliers can access sales data, OTIF and SQEP compliance scorecards, item management tools, financial data including invoices and deductions, and buyer messaging. Both Retail Link and EDI are essential systems for every Walmart supplier.

OTIF stands for On-Time In-Full, Walmart’s signature compliance program that measures whether shipments arrive within the MABD delivery window (On-Time) and contain the correct quantities (In-Full). Walmart expects approximately 98% OTIF compliance, measured monthly. Failures trigger automatic chargebacks of 3% of the affected order value. Chargebacks are deducted directly from payments. Suppliers can dispute invalid chargebacks through Retail Link within a 30-day window. Vantree monitors your EDI transactions in real time to catch issues before they become OTIF penalties.

Walmart retail (stores and distribution centers) uses traditional EDI as described throughout this page, with AS2 protocol, ANSI X12 standards, and OTIF compliance requirements. Walmart Marketplace (third-party sellers on Walmart.com) uses Walmart’s API-based integration platform instead of EDI. If you sell through both channels, you may need both integration types. Drop ship vendors who ship directly to Walmart.com customers have a hybrid requirement set that can include both EDI and API elements. Vantree supports both integration models.

The timeline depends on your current systems, volume level, and the complexity of your integration. With Vantree’s managed service, most suppliers are fully compliant and processing orders within two to six weeks. This includes AS2 connection setup, document mapping for all required transaction sets, testing and certification, and Retail Link alignment. Suppliers opting for Walmart’s WebEDI portal can be live even faster, though they should plan for the one-year minimum commitment before switching to traditional EDI.

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