What Is EDI? The Essential Guide for B2B

If you are a supplier, distributor, or manufacturer selling to retailers, you have probably heard "you need EDI" at some point. Maybe a buyer at Walmart or Target told you it is mandatory. Maybe your largest customer just sent you a document full of cryptic codes and segment delimiters. Either way, you are here because EDI matters to your business and you want to understand it without drowning in jargon.

This guide covers everything: what EDI is, why it exists, how it works, which transaction types you will encounter, what it costs, how small businesses can approach it, and a phase-by-phase implementation timeline. Think of it as the single reference you come back to as your EDI needs grow.

What Is EDI?

EDI (Electronic Data Interchange) is a standardized method for businesses to exchange documents electronically: purchase orders, invoices, shipping notices, inventory updates, and more. Instead of emailing a PDF or faxing a paper form, EDI transmits structured, machine-readable data between two systems automatically.

The key word is standardized. Unlike an email that a human reads, an EDI document follows a rigid format that both the sender's and receiver's systems agree on. A purchase order from Walmart looks structurally the same as one from Target or Kroger -- the data is in the same places, labeled the same way -- so your system can process it without human intervention.

Why Does EDI Exist?

EDI has been around since the 1970s, originally developed to speed up supply chain operations in transportation and retail. Today, B2B e-commerce transactions represent trillions of dollars annually, with EDI handling the vast majority of that volume. The problem it solved then is the same one it solves now: manual data entry is slow, expensive, and error-prone.

When a retailer sends hundreds of purchase orders a day to hundreds of suppliers, and each supplier keys those orders into their own system by hand, errors pile up. Wrong quantities, wrong addresses, mistyped SKUs. EDI eliminates that by letting computers talk directly to computers in a language both sides understand.

The X12 Standard

In North America, most EDI follows the ANSI X12 standard, maintained by the Accredited Standards Committee (ASC). X12 defines hundreds of "transaction sets" -- document types, each identified by a three-digit number. The ones you encounter in commerce are a small subset, covered below.

Outside North America, EDIFACT (maintained by the UN) is the dominant standard, particularly in Europe. Both standards facilitate the global supply chain data exchange that underpins modern commerce. The concepts are the same -- only the formatting rules differ.

How EDI Works

At a high level, EDI follows this flow:

1. A business event happens -- a retailer places an order, a supplier ships goods, an invoice is due
2. The sender's system generates an EDI document -- structured according to the agreed-upon format
3. The document is transmitted -- via AS2, SFTP, or a Value-Added Network (VAN)
4. The receiver's system parses the document -- extracting the data into their ERP, OMS, or other system
5. An acknowledgment is sent back -- confirming the document was received and is valid

No humans need to touch the data at any step. That is the point.

Transmission Methods

AS2 (Applicability Statement 2) is the most common method for large retailers. It is a direct, encrypted, point-to-point connection between two systems. Walmart, Target, and Amazon all support AS2. No middleman, no per-transaction fees.

VAN (Value-Added Network) is a third-party network that acts as a postal service for EDI documents. You send your documents to the VAN, and the VAN routes them to the right trading partner. VANs charge monthly fees plus per-transaction costs, but they simplify managing connections with many partners. For a deeper look at how VANs work, see our guide on EDI VANs explained.

SFTP (Secure File Transfer Protocol) is a simpler approach where EDI files are uploaded/downloaded from a secure server. Less common for major retailers but still used by some mid-market trading partners.

ISA/GS Envelope Structure

Every EDI transmission is wrapped in an envelope structure. The ISA (Interchange Control Header) identifies the sender, receiver, and control numbers. The GS (Functional Group Header) groups related transaction sets. Inside those envelopes sit the actual documents -- the 850s, 856s, and 810s. Understanding this structure matters during implementation because each retailer has specific requirements for qualifier codes, sender/receiver IDs, and control number sequencing.

The EDI Transaction Types That Matter in Commerce

You do not need to memorize all 300+ X12 transaction sets. In B2B commerce, the following are the ones that drive your day-to-day operations.

The Order-to-Cash Cycle

These five transaction types form the backbone of every retail supply chain relationship:

| Transaction | Name | Direction | What It Does | | ----------- | ------------------------- | ------------------- | ---------------------------------------------------------------------------------------- | | 850 | Purchase Order | Retailer to Supplier | The order itself -- what the retailer wants to buy, quantities, prices, ship-to addresses | | 855 | PO Acknowledgment | Supplier to Retailer | Confirms the supplier received the PO and can (or cannot) fulfill it | | 856 | Advance Ship Notice (ASN) | Supplier to Retailer | Tells the retailer exactly what was shipped, how it is packed, and when to expect it | | 810 | Invoice | Supplier to Retailer | The bill -- must match the PO and ASN for payment to process | | 820 | Payment Order/Remittance | Retailer to Supplier | Payment details and remittance advice |

If you are just getting started with EDI, these are the transactions you will implement first. Most retailers require at least the 850, 856, and 810 before you can go live.

Deep dives: What is EDI 850? | What is EDI 856? | What is EDI 810?

Acknowledgments

| Transaction | Name | Direction | What It Does | | ----------- | ------------------------- | ---------------- | ------------------------------------------------------------------------------------------- | | 997 | Functional Acknowledgment | Either direction | Confirms that an EDI document was received and is syntactically valid -- like a read receipt |

The 997 is simple but critical. Most retailers track how quickly you send 997 acknowledgments and penalize slow responses. Walmart, for example, expects a 997 within 24 hours of receiving any EDI document. Many retailers expect them within minutes.

Inventory and Catalog

| Transaction | Name | Direction | What It Does | | ----------- | ------------------------ | ------------------- | --------------------------------------------------------------------------------- | | 846 | Inventory Inquiry/Advice | Either direction | Shares current inventory levels so partners can plan ordering and avoid stockouts | | 832 | Price/Sales Catalog | Supplier to Retailer | Product catalog with pricing, pack sizes, and item details |

These become important as your trading relationships mature. Retailers increasingly want real-time or daily inventory feeds (846) so their replenishment systems can order proactively rather than reactively.

Deep dive: What is EDI 846?

Warehouse and Logistics

| Transaction | Name | Direction | What It Does | | ----------- | ------------------------- | ------------------- | --------------------------------------------------- | | 940 | Warehouse Shipping Order | Company to Warehouse | Tells a 3PL or warehouse to ship specific inventory | | 945 | Warehouse Shipping Advice | Warehouse to Company | Confirms what the warehouse actually shipped | | 204 | Motor Carrier Load Tender | Shipper to Carrier | Books a freight shipment | | 214 | Shipment Status | Carrier to Shipper | Tracking updates from the carrier |

You will encounter these if you work with third-party logistics providers (3PLs) or manage your own freight operations.

Returns and Adjustments

| Transaction | Name | Direction | What It Does | | ----------- | ----------------------- | ------------------- | ----------------------------------------------------------------------------------- | | 860 | PO Change Request | Retailer to Supplier | Modifies an existing purchase order (quantity changes, date changes, cancellations) | | 812 | Credit/Debit Adjustment | Either direction | Post-invoice corrections -- credits, debits, allowances |

When Will You Encounter EDI?

Most companies encounter EDI for the first time in one of these scenarios:

1. A major retailer requires it. Walmart, Target, Kroger, Home Depot, Costco, and Amazon Vendor Central all mandate EDI. If you want shelf space, you need EDI capability. This is the most common trigger.

2. Your order volume outgrows manual processing. Even without a retailer mandate, once you process 10+ purchase orders a day across multiple customers, manual entry becomes a bottleneck. EDI (or EDI-like automation) eliminates that bottleneck. But not every order arrives as EDI -- for everything else, see our guide on processing orders that arrive outside of EDI.

3. A distributor or wholesale partner requests it. Large distributors across the country require EDI from their suppliers, even if they are not retail giants. It is how they keep their warehouses running efficiently.

4. You are expanding into new sales channels. Moving from D2C into wholesale, or from regional to national distribution, often means adding EDI capability.

EDI for Small Business: What You Need to Know

You just landed a deal with a major retailer. Then procurement sends the vendor onboarding packet, and buried on page three: "All suppliers must be EDI-capable within 90 days." Your team is five people. Your ERP is QuickBooks or a small Acumatica instance. And you are wondering whether EDI is going to eat your entire margin before you ship a single case.

The reality: EDI for small business is achievable without a seven-figure IT budget or a dedicated integration team. Thousands of small suppliers trade electronically with Walmart, Target, Kroger, and Amazon every day.

Debunking Common Myths

"EDI costs $50,000+ to implement." Traditional EDI through a legacy VAN provider with on-premise translation software could cost $30,000-$75,000 upfront, plus $1,000-$3,000 per month. That model still exists for large enterprises with thousands of trading partners. But modern cloud-based platforms have dropped the entry cost to $200-$1,500 per month for small businesses, with no multi-month implementation timelines.

"You need a dedicated IT team." Legacy EDI required someone who understood X12 segment syntax, ISA/GS envelope structures, and AS2 certificate configuration. Today's platforms abstract that complexity. You configure trading partners through a web interface, the platform handles translation and compliance, and you focus on filling orders.

"Small order volume makes EDI not worth it." Even at 20-50 orders per month from a single retailer, the math favors EDI. Manual order entry takes 5-15 minutes per order, and error rates run 2-5%. A single short shipment or wrong item can trigger a chargeback of $500 or more. Over a year, even modest volume adds up.

"My retailer will make an exception." They will not. Walmart's vendor onboarding requires EDI compliance. Target's does too. Some retailers offer a web-based EDI portal as a temporary bridge, but those portals still require manual data entry and most retailers expect you to move to automated EDI within 6-12 months.

The Real Cost: Traditional vs. Modern

Here is how the numbers break down for a small business with 1-3 retail trading partners and 100-500 orders per month.

Traditional EDI Setup (Legacy VAN + Translation Software)

| Cost Category | Typical Range | |---|---| | Translation software license | $5,000-$25,000 upfront | | VAN setup and onboarding | $1,000-$5,000 per partner | | Monthly VAN subscription | $300-$800/month | | Per-transaction fees (kilo-character) | $0.05-$0.25 per KC | | Mapping/consultant services | $2,000-$10,000 per partner | | Annual maintenance | $3,000-$8,000 | | Year 1 total (estimated) | $15,000-$50,000+ |

These numbers reflect pricing from providers like OpenText, IBM Sterling, and traditional VAN networks. The Accredited Standards Committee X12 maintains the EDI standards, and the ecosystem around those standards has historically been enterprise-focused.

Modern Cloud EDI / Order Automation Platform

| Cost Category | Typical Range | |---|---| | Setup/onboarding | $0-$2,000 | | Monthly subscription | $200-$1,500/month | | Per-transaction fees | $0-$0.10 (many platforms include) | | Trading partner onboarding | Included or $200-$500 per partner | | Mapping/configuration | Self-serve or included | | Year 1 total (estimated) | $2,400-$20,000 |

A small supplier spending $5,000-$15,000 per year on a modern platform gets the same EDI compliance capabilities that used to require $40,000+ in year one alone.

Three Approaches for Small Businesses

Approach 1: Value-Added Networks (VANs): A VAN acts as a mailbox service. You send your EDI documents to the VAN; they route them to the correct trading partner. Providers like SPS Commerce, TrueCommerce, and Cleo operate this model. Monthly fees plus per-transaction costs. Best for small businesses with 2-5 retail partners and moderate volume, but watch the per-transaction costs -- they become prohibitive once you scale past a few hundred orders per month.

Approach 2: Direct EDI Connections (AS2/SFTP): Some retailers support direct connections. AS2 provides encrypted, point-to-point exchange. No per-transaction fees once live. More technical setup. Best when eliminating per-transaction fees justifies the effort. Target EDI requirements and Walmart EDI requirements outline what each retailer expects for direct connections.

Approach 3: EDI-as-a-Service / Order Automation Platforms: These handle EDI parsing, validation, and routing alongside other order formats like PDF, CSV, and email. Flat or predictable pricing. Faster onboarding. Best when EDI is one of several order channels, not the only one. OrderSync follows this model, processing EDI alongside PDFs, CSVs, and email orders through AI-powered extraction in a single pipeline.

EDI Implementation: Phase by Phase

Whether you are connecting to your first retailer or your tenth, EDI implementation follows well-defined phases. The suppliers who execute smoothly share a few traits: they read the spec thoroughly, plan testing time generously, involve operations early, and build validation into every step.

Phase 1: Planning and Requirements (Weeks 1-3)

Gather trading partner requirements. Before evaluating any platform, get the specifics from your retailer:

• Required transaction types (typically 850, 810, 856, 997 at minimum)
• Transmission method (AS2, SFTP, or VAN)
• The retailer's EDI implementation guide (their spec document for each transaction)
• Testing requirements (how many test cycles, who certifies you)
• Go-live deadline

Most retailers publish this in their vendor onboarding portal. Walmart uses Retail Link, Target uses Partners Online, Kroger has their own supplier portal.

Assess your current systems. Can your ERP handle EDI natively? Many mid-market systems (NetSuite, SAP Business One, Acumatica) have EDI modules, but they often require heavy customization. Key questions:

• Where do orders currently enter your system?
• Can your ERP export the data needed for outbound 856 and 810 documents?
• Do you have unique product identifiers (UPC, GTIN) registered with GS1?
• What is your IT team's bandwidth for a 2-4 month project?

Define your project team. EDI implementation is not a one-person job. You need a project lead, an IT/integration resource, an operations stakeholder to validate warehouse workflows, a finance contact for invoice mapping, and a warehouse lead to confirm ASN data (carton counts, weights, SSCC-18 labels) can be captured at ship time.

Phase 2: Connection and Setup (Weeks 2-4)

Obtain and read the retailer's spec documents. Every retailer provides an EDI implementation guide defining segment usage, qualifier codes, ISA/GS envelope requirements, and connection details. Read the entire spec before writing a single line of mapping. The X12 standards body publishes the base transaction set definitions, but every retailer customizes them. The retailer's guide is your source of truth.

Establish the technical connection. For AS2, you exchange digital certificates, configure software (Mendelson, OpenAS2, or commercial tools), and complete connectivity tests. For SFTP, the retailer provides host, credentials, and folder structure. For VAN, you enroll, configure your mailbox, and test routing.

Set up separate test and production environments. Test with retailer-provided sample documents before touching live data.

Phase 3: Mapping and Translation (Weeks 3-6)

Mapping defines how each segment and element in an EDI document translates to and from fields in your ERP. A solid ERP integration makes this process smoother.

Map inbound documents. The most common is the EDI 850 purchase order. Your mapping defines how segments map to ERP fields: PO number, line items, quantities, unit prices, ship-to addresses, delivery dates, and product identifiers. Retailers have variations -- Walmart uses their own internal item numbers alongside UPCs, Target requires DPCI codes, Amazon uses ASINs.

Map outbound documents. You will need:

• EDI 997: Functional acknowledgment confirming receipt. Must go out fast -- most retailers expect it within minutes.
• EDI 855: PO acknowledgment. Some retailers require it; others consider it optional.
• EDI 856: Advance ship notice with shipment details, carton-level data, tracking numbers, and SSCC-18 barcodes where required.
• EDI 810: Invoice for payment processing. Must match the PO and ASN for three-way matching.

Build validation rules. Check required segments and elements, qualifier codes, quantity and price ranges, product identifier existence, and date formats (CCYYMMDD vs. YYMMDD varies by partner). A tool like our free EDI Inspector can help you parse and validate EDI files during development.

Phase 4: Testing and Certification (Weeks 5-10)

Testing is where timelines slip most often. According to the Drummond Group, a leading EDI certification body, underestimating testing timelines is the single most common cause of implementation delays.

Unit testing (internal). Before involving the retailer, parse sample inbound 850s and verify they populate your ERP correctly. Generate outbound 997s, 856s, and 810s from test orders and validate against the spec. Test error scenarios: missing fields, invalid product IDs, duplicate PO numbers.

Integration testing with the retailer. You send test documents to the retailer's test environment. Their EDI team validates against their spec. They return feedback -- pass, fail, or pass with warnings. You fix issues and resubmit. Once all transaction types pass, the retailer certifies you for production.

Certification timelines by retailer:

• Walmart: Automatic validation, but the queue can be long. Plan 3-4 weeks minimum.
• Target: Thorough on ASN data -- carton-level detail with SSCC-18 is mandatory. Budget 2-3 weeks.
• Amazon: Uses Vendor Central EDI testing flow with specific routing and label formats. Plan 2-4 weeks.

Common testing mistakes to avoid:

• Using placeholder data instead of real product IDs and warehouse locations
• Ignoring the 997 (late or missing acknowledgments trigger compliance alerts)
• Skipping edge cases (unknown items, new addresses, PO amendments)
• Testing EDI formatting without testing the full end-to-end flow through your ERP

Phase 5: Go-Live and Optimization (Ongoing)

Soft launch. Go live with a subset of orders or one distribution center. Monitor the first 50-100 orders for control number conflicts, timing mismatches, and product ID issues.

Monitor and maintain. Set up alerts for failed transmissions, validation errors, and late acknowledgments. Track compliance metrics: on-time 997s, ASN accuracy, invoice match rates. Stay current on retailer spec changes -- major retailers update requirements at least annually.

Optimize. Automate exception handling for common issues. Reduce acknowledgment latency from batch to near-real-time. Expand transaction coverage to 846 inventory advice, 860 PO changes, or 824 application advice as partners require them.

Implementation Timeline by Company Size

| Company Size | IT Resources | First Partner | Each Additional Partner | | --- | --- | --- | --- | | Small (under 100 employees) | Limited or outsourced | 12-16 weeks | 3-5 weeks | | Mid-market (100-500 employees) | 1-2 dedicated staff | 8-12 weeks | 2-4 weeks | | Enterprise (500+ employees) | Dedicated EDI team | 6-10 weeks | 1-3 weeks |

These assume a single trading partner for the initial implementation. Running multiple partner implementations in parallel can compress total timeline but increases team workload.

What Specific Retailers Expect

Retailer requirements vary, and the details matter. Here are specifics that trip up first-time EDI suppliers.

Walmart requires OTIF (On Time In Full) compliance with strict delivery windows. Their EDI setup mandates AS2 connectivity (or a VAN that connects via AS2), and they expect carton-level ASN data. Late or missing ASNs result in chargebacks that can exceed the margin on the shipment. See our full Walmart EDI requirements guide.

Target requires DPCI codes at the item level and has specific 856 ship notice requirements for carton-level detail. Their testing process is thorough -- expect 3-4 test cycles minimum.

Kroger and other grocery retailers often require additional transaction types for promotions and inventory. The GS1 standards for product identification (UPC/GTIN) and shipping container codes (SSCC-18) are strictly enforced.

Amazon Vendor Central has its own EDI requirements with tight turnaround times for PO acknowledgment and ASN submission. Their penalty structure for late confirmations is aggressive.

Common Challenges and Pitfalls

Complexity. EDI documents look intimidating. An 850 purchase order is a wall of segment codes, qualifiers, and delimiters. It takes specialized knowledge to read, let alone implement.

Every partner is different. While EDI is "standardized," every retailer has their own implementation guide with specific requirements. Walmart wants data in certain fields that Target ignores, and vice versa. You need to test and certify with each trading partner individually.

Maintenance. EDI is not set-and-forget. Retailers update their requirements. Products change. New partners come online. Someone needs to monitor for transmission failures, parsing errors, and compliance issues.

Skipping the 997. The functional acknowledgment confirms you received the document. Some retailers flag your account as non-compliant if acknowledgments do not send within their expected window (often 1-4 hours).

ASN accuracy. The EDI 856 ship notice is where most chargebacks originate. Missing SSCC-18 barcodes, wrong carton counts, or late transmission all trigger penalties.

Not connecting EDI to your actual workflow. EDI data that lands in a mailbox and still requires manual re-entry into your ERP defeats the purpose. Make sure your solution includes ERP integration or at minimum automated file import into your system.

Modern Approaches to EDI

EDI does not have to mean six-figure implementations and dedicated IT staff anymore. Modern platforms handle the complexity for you.

OrderSync automates the entire EDI workflow -- receiving purchase orders, matching products and customers, validating pricing, and syncing to your ERP or order management system. It handles EDI alongside PDFs, CSVs, and email orders through multi-format order processing, so you have one system regardless of how your customers send orders.

Key benefits of a modern approach:

• Predictable pricing -- monthly plans without VAN middleman costs
• Automatic parsing -- EDI documents converted to readable formats instantly
• Smart matching -- product codes and customer data mapped automatically
• Multi-format support -- EDI, PDF, CSV, and email in one platform
• Real-time validation -- errors caught before they become chargebacks

If your order mix includes many PDF, CSV, or email orders alongside EDI, a unified order processing automation platform may be more practical than a standalone EDI solution. EDI is just one step in the broader order-to-cash cycle -- automating it alongside other order formats is what creates real operational leverage. For a deeper comparison of integration approaches, see our EDI vs API analysis.

Getting Started

If a retailer just told you "you need EDI":

1. Request their EDI implementation guide -- it lists exactly which transaction sets they require and how to connect
2. Choose a platform or provider to handle the technical side
3. Complete testing (usually 2-6 weeks depending on the retailer)
4. Go live and monitor your first production orders closely

If you are exploring EDI to improve operations:

1. Audit your current order flow -- how many orders per week, what formats, how much manual entry
2. Calculate the cost of manual processing (time, errors, chargebacks)
3. Evaluate modern platforms that handle multiple formats, not just EDI

Either way, start with the free EDI Inspector tool to see what is inside an EDI document. It is the fastest way to demystify the format.

Frequently Asked Questions

What is EDI in simple terms?

EDI is a way for businesses to send documents like purchase orders and invoices directly between their computer systems, using a standard format both sides agree on. Instead of emailing a PDF or faxing a paper form, the data moves automatically from one system to another. No human has to re-type anything, which cuts out errors and speeds up the whole process.

How much does EDI cost for a small business?

Traditional EDI setups cost $10,000 to $50,000 upfront, plus $500 to $2,000 per month in VAN fees and per-transaction charges. Modern cloud-based platforms have brought that down to $200-$1,500 per month with no per-transaction fees. The right option depends on your order volume and how many trading partners you work with. Avoid any provider requiring $10,000+ upfront for a small business implementation -- that pricing model is outdated.

How long does EDI implementation take?

For your first trading partner, plan for 8-16 weeks depending on your internal resources and the retailer's testing timeline. This includes account setup, connection configuration, mapping, testing, and retailer certification. Subsequent partners typically take 2-4 weeks since the foundation is already in place.

Do I need EDI to sell to Walmart?

Yes. Walmart requires EDI from all suppliers, with no exceptions. You will need to support at least the 850 (purchase order), 856 (advance ship notice), 810 (invoice), and 997 (functional acknowledgment) transaction sets. You will also need an AS2 connection or a VAN that connects to Walmart's network. Plan for 4-8 weeks of testing and certification before going live.

Can I use a web portal instead of full EDI?

Some retailers offer web EDI portals where you manually enter order data into their system. This satisfies their "EDI requirement" technically, but you are still doing manual data entry. It works as a bridge for very low volume (under 20 orders per month), but it does not scale and does not eliminate the errors that come with manual keying.

Do I need a VAN for EDI?

Not necessarily. VANs simplify connectivity and routing, but direct connections via AS2 or SFTP are common, especially with large retailers. Your choice depends on how many trading partners you have and your IT team's capacity.

What is the difference between EDI and API?

EDI uses rigid, standardized document formats (like X12) and typically operates in batch mode, sending files on a schedule. APIs use modern data formats like JSON and communicate in real time, request by request. EDI is required by most major retailers and has been the standard since the 1970s. APIs are newer, more flexible, and growing in adoption. Many businesses end up using both. See our full EDI vs API comparison for details.

What EDI transaction types do I need to start?

At minimum: EDI 850 (purchase order), EDI 997 (functional acknowledgment), EDI 856 (advance ship notice), and EDI 810 (invoice). These four cover the core order-to-cash cycle. Some retailers also require the 855 (purchase order acknowledgment) and 846 (inventory inquiry). Check your specific retailer's vendor guide for the exact list. Our EDI 850 purchase order guide walks through the structure in detail.

Can I implement EDI without an IT team?

Yes, but you will need an external partner. EDI-as-a-Service providers and managed EDI services handle the technical work. You will still need someone internally who understands your order and fulfillment workflows to validate the integration.

What happens if I miss my retailer's EDI compliance deadline?

Consequences vary by retailer. Common penalties include chargebacks ($500-$5,000 per incident), temporary shipment holds, loss of promotional opportunities, and in severe cases, account suspension. Communicate early if you are at risk of missing a deadline -- most retailers will grant extensions if you are actively testing.

How do I know if my EDI documents are formatted correctly?

Use a parsing and validation tool during development. Our free EDI Inspector lets you paste raw EDI and see the segment structure visually. For production validation, your EDI platform should check every outbound document against the retailer's spec before transmission.

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Continue learning:

• What is EDI 850? Purchase Orders
• What is EDI 856? Advance Ship Notices
• What is EDI 810? Electronic Invoices
• What is EDI 846? Inventory Inquiry/Advice
• EDI vs API: Which is Right for Your Business?
• Walmart EDI Requirements
• Target EDI Requirements
• Free EDI Inspector Tool