One Reason Code, Four Root Causes

A late ASN chargeback tells you what the retailer recorded. It doesn't tell you what happened.

I've traced that same code back to four different failures, and only one of them is what people assume.

The one nobody checks

Start with the one nobody checks. The 856 went out early and got rejected. An 824 or a negative 997 came back, nobody was watching that mailbox, and as far as the retailer is concerned no ASN ever arrived. You have proof you transmitted on time. That's the disputable one, and it tends to get paid without much argument.

The boring ones

Then the boring ones.

If a 3PL ships for you, your 856 usually comes off the 945 they send back. A job that runs at 6pm is perfectly fine for a three day lane and late for anything gating in next morning. Same job, same warehouse, and only your short lanes get charged.

Carrier pickup drifted. Used to be 4pm, quietly became 2pm over a few months, and your transmission window never moved. Nothing on your side changed, which is exactly why nobody suspects it.

Or the warehouse ships before it scans, so the data that builds the ASN doesn't exist until the truck is gone.

Four causes. One code on the remittance. Fixing the wrong one costs a quarter.

The afternoon check

The check takes an afternoon. First look for 824s and negative 997s on the shipments that got charged. If they're there, stop. You've found it, and you can dispute it.

For whatever's left, put the 856 timestamp next to the gate-in time and look at the shape of the gap rather than the size.

Constant offset means a batch job, because the same clock is wrong every time. A gap that widens over weeks means pickup drift. Erratic, with no pattern by lane or day, means scan discipline. That's people rather than systems.

Twenty rows in a spreadsheet and you know which one you have.

Most suppliers never run it, because the deduction arrives with a code that sounds like it already told you the answer.

That's most of what a chargeback audit is. You don't need us for one code, though.