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Costco EDI: The Complete Supplier
Compliance Guide
Costco EDI: The Complete Supplier
Compliance Guide
Get EDI compliant with Costco including ASN accuracy from day one. Live in 2 to 4 weeks.
What Is Costco EDI?
Costco Wholesale operates over 890 warehouse locations worldwide and is known for moving massive volumes of product at speed. All Costco suppliers must exchange purchase orders, shipping notices, and invoices via EDI. There is no manual alternative at Costco’s scale.
Costco uses the ANSI X12 EDI standard and supports VAN (Value-Added Network) connectivity.
If you are new to EDI, start with our Beginner’s Guide to Implementing EDI before diving into Costco-specific requirements.
Required EDI Documents
| DOCUMENT | NAME | DIRECTION | PURPOSE |
|---|---|---|---|
| EDI 850 | Purchase Order | Costco to You | Order details |
| EDI 856 | Advance Ship Notice | You to Costco | Shipment notification and contents |
| EDI 810 | Invoice | You to Costco | Billing for shipped goods |
| EDI 997 | Functional Acknowledgement | Either | Document receipt confirmation |
Get Approved as a Costco Vendor
This happens between you and Costco's buying team before any EDI work begins. Costco's product selection process is highly competitive, so EDI setup only starts after your products are accepted.
Receive EDI Specifications from Costco:
Once approved, Costco's vendor relations team provides their specific EDI document requirements, mapping specifications, and testing procedures.
Get Your GS1 Identifiers
Costco requires GS1-compliant UPC/GTIN codes on all products and GS1-128 labels on all pallets and cartons. Register at gs1us.org if you do not have these yet.
Connect with Elevate
This is where we take over. When you sign up with Elevate, our team sets up your VAN connection to Costco (Costco primarily uses VAN connectivity, which is simpler than AS2), maps all required EDI documents to Costco's specifications, and configures your account for your specific product categories.
Test and Certification
Costco requires testing and validation before you go live. We submit test documents, verify that your ASN data matches Costco's exact requirements, and get you certified. Costco's automated receiving systems demand precision, so we pay extra attention to ASN accuracy during testing.
Go Live
Orders start flowing. Elevate monitors your document traffic, catches ASN mismatches before they trigger chargebacks, and keeps your maps updated whenever Costco changes their specs.
Commerce or TrueCommerce.
Costco Chargebacks and Compliance
Top risk: ASN inaccuracy. Costco's warehouse receiving is highly automated. If your EDI 856 does not match what physically arrives, even by one case, it disrupts their flow and triggers immediate penalties.
Elevate’s real-time document monitoring catches mismatches and errors before they become chargebacks. We also update your maps when Costco changes specifications, at no extra cost.
How Elevate Protects You from Chargebacks
Real-time Monitoring
We watch your 997 and 824 messages and catch rejections before they become chargebacks.
Automated ASN Generation
No manual error in the most chargeback-prone document
Proactive Compliance Updates
We update your maps when Costco changes specs, at no extra cost.
ERP Integration
Data flows from your backend system directly. No re-keying, no human error.
Still Have Questions About How to Get EDI Compliant with Costco?
Our team has helped multiple suppliers get Costco-compliant. Let us walk you through it.
Frequently Asked Questions
A: Costco primarily uses VAN connectivity, which is simpler to set up than AS2. Elevate establishes and manages your VAN connection to Costco.
A: Typically 2 to 4 weeks, including mapping and testing.
A: ASN inaccuracies, where shipment contents do not match EDI 856 data, are the most frequent issue due to Costco’s highly automated receiving systems.
A: Yes. All pallets and cartons need GS1-compliant GS1-128 labels tied to your ASN data.
A: Yes. Elevate handles all your trading partners from a single dashboard.