Received a Retailer EDI Compliance Notice? Here's Exactly What to Do

First: don't panic. You have more time than you think.

Every year, hundreds of thousands of SMB suppliers receive EDI compliance notices from retailers. The letter looks scary — deadlines, penalties, technical jargon — but the path forward is straightforward once you know what to do.

The biggest mistake suppliers make is waiting. Retailers set compliance windows of 30 to 90 days, and the testing process takes time even when everything works perfectly. Start this week, not next month.

Step 1: Identify exactly what the retailer is asking for

The compliance notice will reference specific EDI transaction sets (also called "documents" or "message types"). The most common are:

• EDI 850 — Purchase Order (sent to you from the retailer)
• EDI 855 — Purchase Order Acknowledgment (your confirmation to the retailer)
• EDI 856 — Advance Ship Notice, or ASN (you send this before your shipment arrives)
• EDI 810 — Invoice (you send this after shipment)
• EDI 997 — Functional Acknowledgment (automated receipt confirmation)

Almost every retail EDI program requires all five. The 856 ASN is the most critical — it's also the one that triggers the highest chargebacks when it's wrong or late.

Some retailers also require GS1-128 shipping labels with SSCC-18 barcodes on every carton and pallet. This is a separate requirement from EDI but is almost always mentioned in the same notice.

Step 2: Understand the transport method required

EDI documents are transmitted over specific protocols. Retailers are strict about which one they accept. The three you'll encounter most often:

• AS2 (Applicability Statement 2) — The most common for Walmart, Target, Amazon, and most large retailers. AS2 is a direct, secure HTTP-based connection between you and the retailer. You need an AS2 certificate and a configured endpoint.
• VAN (Value-Added Network) — A third-party network acts as the intermediary. Home Depot uses IBM Sterling; Costco routes through SPS Commerce. VAN connections usually cost more per document.
• SFTP — Secure file transfer over SSH. Some retailers accept SFTP as an alternative to AS2, especially for lower-volume suppliers.

Your compliance notice will specify which protocol is required. If it doesn't, look it up in the retailer's vendor manual (available on their supplier portal) or contact their EDI support line directly.

Step 3: Get on the retailer's supplier portal immediately

Every major retailer has a dedicated portal where EDI setup begins:

• Walmart / Sam's Club: Retail Link (retailerlink.walmart.com)
• Target: Partners Online (partnerlink.target.com)
• Home Depot: Supplier Hub (supplierhub.homedepot.com)
• Amazon: Vendor Central (vendorcentral.amazon.com)
• Kroger: Webgate+ (webgate.kroger.com)
• Costco: Costco Connect

Log in, find the EDI setup section, and download the EDI implementation guide for your supplier type. This document contains the exact mapping specifications — the data fields the retailer expects in each transaction set.

If you don't have portal access yet, request it today.Some portals take 3–5 business days to provision access. Every day counts when you're working toward a compliance deadline.

Step 4: Choose your EDI provider

Unless you have a development team and significant time, you will need an EDI software provider. There are two main types:

• Full-service managed EDI — The provider handles mapping, translation, testing, and monitoring for you. Higher cost, faster time to compliance. Best if you have a hard deadline within 60 days.
• Self-serve EDI platforms — You configure the mappings using a web interface. Lower cost, requires more internal effort. Best if you have someone technical who can dedicate a few days to setup.

When evaluating providers, ask these four questions:

1. Do you have pre-built mappings for my specific retailer?
2. What is the typical time from signup to first production transaction?
3. Do you support AS2 natively, or do I need to set up a separate AS2 connection?
4. What happens when an 856 is rejected or a 997 isn't received? Who monitors that?

Pre-built retailer mappings are the most important factor. Building a mapping from scratch for Walmart or Target takes weeks. A provider with that mapping pre-built can get you through testing in days.

Step 5: Complete the retailer's testing process

Before you go live, every major retailer requires testing. This involves sending test EDI documents and receiving confirmation that your data is formatted correctly.

What to expect during testing:

• The retailer will assign you an EDI coordinator or provide a testing portal. Get their contact information and keep it.
• You will send test 850s, 855s, 856s, and 810s — usually with sample data provided by the retailer.
• They will send back a 997 Functional Acknowledgment for each transmission. If the 997 shows errors (codes like AK5*R), your mapping is wrong.
• Common first-round errors: missing qualifiers on the ISA envelope, wrong date formats, incorrect UPC/GTIN values, missing SSCC codes on the 856.
• Most suppliers require 2–4 test rounds. Each round can take 1–3 business days for retailer feedback.

Budget 2–4 weeks for testing even if your mapping is correct from day one. Retailer EDI teams are often backlogged.

Step 6: Set up your GS1 barcodes

If your compliance notice mentions GS1-128 labels or SSCC-18 barcodes, this is a separate item from EDI software. GS1-128 labels go on every carton and pallet and contain a machine-readable SSCC code that ties back to your ASN.

Steps to get GS1 compliant:

1. Register with GS1 US (gs1us.org) if you don't have a GS1 Company Prefix. This takes 1–2 business days and costs $250–$1,500 depending on the prefix length.
2. Generate your GTINs (Global Trade Item Numbers) for each product SKU.
3. Configure your EDI software to generate SSCC-18 codes for each shipping unit.
4. Print GS1-128 labels using a thermal label printer (Zebra ZPL is the industry standard).

Most modern EDI platforms handle SSCC generation automatically once your GS1 prefix is configured. The label printing can be done from a $200–$400 Zebra printer.

Step 7: Know your chargeback exposure

Once you're live, your biggest financial risk is chargebacks — deductions the retailer takes directly from your payment for EDI errors. The most common triggers:

• Late or missing 856 ASN — The most expensive single error. Walmart charges per shipment; Amazon charges 3–10% of PO value. The ASN must be sent before the shipment arrives at the retailer's DC.
• ASN/label mismatch — The SSCC code on the physical carton doesn't match what you sent in the EDI 856.
• Missing or late 810 Invoice — Dick's charges $25 per invoice after 48 hours. Walgreens rejects invoices older than 90 days and charges a $200 fee.
• Wrong unit of measure (UOM) — Particularly common at Lowe's, which enforces that your UOM on the 810 matches the selling unit exactly.

Most EDI platforms have built-in validation that catches these errors before transmission. Enable every validation rule your provider offers — the cost of an EDI subscription is nothing compared to a single Walmart ASN chargeback wave.

Realistic timeline for compliance

The fastest path: pre-built mappings + managed onboarding

Traditional EDI onboarding — hiring a consultant, building custom mappings, debugging 997 errors alone — takes 3–6 months and costs $5,000–$30,000. That's the old way.

Modern EDI platforms have already built and tested the retailer-specific mappings. When you sign up, you're selecting an existing, proven configuration rather than starting from scratch. Combined with a managed onboarding service — where the provider's team coordinates the testing process with the retailer on your behalf — most suppliers go live in 10–30 days instead of 10–30 weeks.

If your compliance deadline is 30–45 days away, you need this approach.

What happens if you miss the deadline?

Missing a retailer's EDI compliance deadline rarely means immediate account termination — but it does mean financial pain:

• Paper invoice fees (Dollar General: $250 per paper invoice; Nordstrom: $25 per missing EDI 810)
• Delayed payment processing — many retailers won't pay without a matching EDI invoice
• Scorecard penalties — Walmart's OTIF program and Target's Perfect Order Program score your compliance and can affect your trading relationship
• In rare cases, the retailer places a hold on your purchase orders until compliance is achieved

Contact your retailer EDI coordinator as soon as you have a provider selected and a go-live date. Most retailers will accept a realistic timeline if you communicate proactively. What they won't accept is silence.

Start today

The only thing worse than receiving an EDI compliance notice is receiving it again three months later, after the deadline has already passed. Start the portal access request today. Choose your provider this week. Most modern platforms take under an hour to configure for your first trading partner.