Walmart EDI compliance checklist

Everything a new supplier must have in place before the first PO ships, in order. Print it, work down it.

1. Identifiers — collect these first, everything needs them

• ☐ Walmart vendor number (from supplier onboarding)
• ☐ Your EDI sender ID + qualifier (assigned during EDI setup)
• ☐ Walmart's receiver IDs for your programs/DCs
• ☐ GS1 company prefix — required for UPCs and SSCC-18 carton barcodes (buy from GS1, not a barcode reseller, for retail compliance)
• ☐ Confirm which program your POs come from: stores runs X12 004010; import and Walmart.com programs run 005010

2. Documents — can you handle all four?

• ☐ 850 in — can you read it? (free viewer)
• ☐ 855 out — acknowledgment within the required window (guide)
• ☐ 856 out — ASN with correct hierarchy + SSCCs, before the truck (guide)
• ☐ 810 out — invoice matching PO and ASN (guide)
• ☐ 997/824 in — you retrieve and read Walmart's responses (rejections arrive here, not by phone)

3. Physical/label compliance

• ☐ GS1-128 carton labels printing, with SSCCs that match the ASN exactly
• ☐ Pallet configuration and carton hierarchy match what your ASN declares

4. Testing — Walmart's gate, use it as free QA

• ☐ Test transactions submitted for each document type
• ☐ Failures corrected and retested (budget 2–4 weeks)
• ☐ First live documents monitored in the ASN dashboard for 824 rejections

5. Ongoing — where compliance actually lives

• ☐ SQEP dashboard checked weekly for deductions
• ☐ Every transmitted document archived with timestamps (dispute evidence)
• ☐ ASN timing built into the shipping workflow, not done from memory