TUNEEDI · FIELD NOTES

Notes on EDI, chargebacks, and supplier resilience.

Written from inside the work — deduction reports we've actually reconciled, reason codes traced back to root causes, and what onboarding a backup trading partner really costs in weeks.

No.NoteFiled
008

EDI 812, 820 and 891: Which Document Your Deduction Arrives On

The EDI standard has a document for adjustments, a document for payments that carry them, and one built specifically for researching a deduction. Which of them your trading partner actually uses decides how much work a deduction is, and where the dispute has to go.

deductionschargebacks812820891
2026-09-19 4 min
007

Your FSMA 204 Compliance Runs Through Someone Else's Data

The US food traceability compliance date passed in January and Congress defunded enforcement until July 2028. What the rule actually requires, why the FDA says being ready yourself is not enough, and how to test your readiness using the documents you already send.

EDIgrocery and foodservicetraceability856
2026-09-17 7 min
006

Food EDI Isn't Retail EDI

Grocery and foodservice run on different EDI documents than big-box retail. What the 875 and 880 grocery transaction sets are, how catch weight makes the purchase order and invoice disagree on purpose, and why substitution overcharge deductions happen to suppliers doing nothing wrong.

EDIgrocery and foodservice875880
2026-09-08 3 min
005

Your Retailer Just Asked for EDI

A plain-English guide for suppliers who have just been told they need to be EDI compliant. What EDI is, which documents your retailer will ask for, whether you need an EDI provider or can use a free portal, and how long setup actually takes.

EDI onboardingvendor compliance850856810
2026-08-16 4 min
004

Connecting Isn't the Work

Trading partner connection time really has collapsed to days. Spec reconciliation hasn't moved, and the retailer's certification queue never appears in anyone's estimate. Why EDI onboarding still takes weeks even when setup takes hours.

EDI onboardingtrading partners850
2026-08-13 2 min
003

Supplier Replacement Time Is a Spread

Why "onboard a backup supplier" hides a wide range of real timelines — EDI-ready partners, non-EDI partners, and implementation guides that disagree even on the same X12 version — and how to find your worst case in an hour.

EDI onboardingresilience850
2026-08-08 2 min
002

One Reason Code, Four Root Causes

Why a late ASN chargeback can mean four completely different failures — an unread 824, a 3PL batch job, carrier pickup drift, or scan discipline — and how to tell which one you have in an afternoon.

EDIASNchargebacks856824997
2026-08-06 2 min
001

How to Read Your Deduction Report

A practical walkthrough for suppliers on turning a retailer deduction export into disputable, fixable line items — sort by dollars, trace reason codes to root causes, and track the dispute windows.

deductionschargebacks810
2026-08-04 2 min
Showing 9 of 9