Chargeback prevention
We block the non-compliant document before it transmits.
A mandatory, fail-closed pre-send gate validates every 855, 856, and 810 against the retailer’s own document rules — and blocks the send if it doesn’t pass. That stops the document-error deductions: ASN accuracy, envelope IDs, code lists, qualifiers, cross-element checks — caught at the gate, before the retailer ever sees them.
What actually prevents it
Two things move the needle — and they’re both real.
Not a dashboard that tells you about a deduction after it lands. A gate that stops the bad document from leaving, and a rehearsal against the retailer’s real rules before you go live.
A fail-closed pre-send gate.
Every outbound 855, 856, and 810 runs through the retailer’s rule set before it transmits — enforced in both the API and the Engine, so there is no path around it. If the document doesn’t pass, the send is blocked, not warned about. The error surfaces with the exact segment and rule, so you fix it before the retailer ever sees it.
Practice against the real rules.
Before you go live, the retailer simulator transmits a real 850 over AS2 and validates your 855 / 856 / 810 replies against that retailer’s actual document rules — the same rules that gate production. You find the format and code-list mistakes in a dress rehearsal, not in your first week of live chargebacks.
Per-retailer playbook
The document errors each retailer charges for. And the rule that gates them.
Walmart compliance program
OTIF (On-Time, In-Full)
Walmart’s OTIF program scores on-time / in-full delivery per PO. OTIF itself is a logistics outcome — whether the truck arrived on time, in full — so no document engine prevents it. What we gate is the document layer on top: your 855 / 856 / 810 are format-clean and rule-clean before they ever leave, so an ASN-accuracy or envelope deduction can’t be stacked on top of a delivery miss.
Document envelope — verified
X12 4010, UL/GLN qualifier — verified against Walmart’s published spec
| Document-error chargeback | How the pre-send gate catches it |
|---|---|
ASN accuracy / missing 856 segments | Pre-send 856 validation runs every Walmart document rule before transmit — SSCC18 + MAN*GM, BIG04 10-digit numeric, REF*IA vendor number, FOB CC/PP, REF*MR padding. The gate is fail-closed: the send is BLOCKED until the document errors are fixed, so a malformed ASN never reaches Walmart. |
855 PO acknowledgment errors | Pre-send 855 validation verifies BAK-pairing rules and line-decision codes against the Walmart spec before the acknowledgment transmits. The fail-closed gate blocks a non-compliant 855. |
810 invoice format / code-list errors | Pre-send 810 validation checks BIG04 numeric length, REF*IA, FOB and allowance/charge codes against the Walmart code lists. A format or code-list error is caught at the gate, not in a retailer rejection. |
997 functional acknowledgment | 997 functional acks are auto-generated immediately on inbound parse — no operator action required. Outbound retailer 997s are reconciled to your outbound docs by control number so you can see the file landed. |
Source
Built from Walmart’s 856 implementation guide and published supplier requirements.
Precisely scoped
We gate the document layer — and we’re precise about it.
A lot of retailer deductions come from what physically happened in your warehouse and on the truck. We prevent the document-data class of chargebacks — and we’re clear about where that line is, so you know exactly what the gate is holding.
OTIF, fill rate, late delivery
Whether the truck arrived on time and the order shipped in full is a logistics outcome. Our 856 can be flawless and you can still miss OTIF if the freight ran late. We surface the deadline; we don’t move the freight.
Carton-vs-physical mismatches
We validate that the SSCC18 and carton data in the ASN are well-formed and match the document. If what’s physically in the box differs from what the label says, that’s a receiving-dock discrepancy a document validator can’t see.
History-over-time rules
Cross-shipment checks — SSCC reuse across shipments, deduction counts over a period — depend on historical state we evaluate at the account level, not the single-document gate. The pre-send gate holds the per-document rules.
Verified, not guessed
Every rule comes from the retailer’s own published spec.
We read each retailer’s EDI guidelines — the envelope conventions, the code lists, the carton and label rules — and translate them into the reviewed config that is the validation logic. The same fail-closed gate that runs in production is the one your dress rehearsal runs against. No marketing hand-waving: the document rules, and the gate that holds them.
Block it before it ships
Catch the document error at the gate.
Rehearse against the retailer’s real rules, then let the fail-closed gate hold the line on every 855, 856, and 810. Public pricing, self-serve sign-up, no demo required.