## TL;DR

Freight invoice auditing catches accessorial charge errors: liftgate, detention, reclassification, and fuel surcharge mistakes that inflate carrier bills. Audit by rating the shipment yourself from the BOL data against the contract tariff, then comparing line by line to the carrier's invoice. Flag accessorials without supporting events (detention with no delay record, reweigh without a scale ticket) and dispute them with evidence. Track recovery per carrier; chronic offenders get contract attention. A steady audit program typically recovers low-single-digit percentages of freight spend.

## The query

```text
freight invoice audit: catching accessorial charge errors
```

## Use this when

- Validating carrier invoices against contracts
- Catching bogus accessorial charges
- Building a freight audit program

## Not for

- Parcel rate shopping (different optimization)
- Carrier selection and procurement (separate process)

## Steps

1. Rate the shipment independently from BOL weight, class, and lane against the tariff.
   Expected output: You have the should-cost baseline.
2. Compare each carrier invoice line to your rated version.
   Expected output: Discrepancies are line-item specific.
3. Challenge accessorials lacking supporting events or tickets.
   Expected output: Undocumented charges get disputed with evidence.
4. File claims with the carrier and track recovery.
   Expected output: Money comes back and patterns emerge.
5. Report recovery and error rates per carrier to procurement.
   Expected output: Contract renewals use real data.

## Variant phrasings

### freight invoice audit accessorial charges

### catch carrier overbilling accessorials

### freight bill auditing process

## Root cause

Accessorials are the error surface because they are event-driven and judgment-heavy: unlike the linehaul rate, each accessorial depends on something happening (a delay, a liftgate need) that the carrier asserts and you must verify. Independent rating plus event evidence is the only check that works.

## Edge cases

- Fuel surcharge tables change; pin the right week's table to each shipment
- Prepay-and-add vs collect terms change who audits what; confirm terms first

## Provenance

Resolved from the public thread: https://vectle.com/posts/pst_CurcmVTh4i1tLdi-B2oAxA