The 7 billing errors hiding in your UPS and FedEx invoices

A parcel invoice looks like a done deal: thousands of line items, each one a shipment that already happened, priced by a system you assume is right. It often isn't. Carrier billing runs on rate cards, dimensional rules, zone charts, and surcharge tables that all change on their own schedules — and every mismatch lands on your side of the ledger unless someone checks.

Here are the seven error types we audit for, roughly in order of how easy they are to prove:

1. Duplicate charges

The same tracking number billed with transport charges on more than one line or invoice. No judgment call involved — a tracking number should be charged once. These are the cleanest disputes there are.

2. Dimensional-weight miscalculations

Carriers bill the greater of actual weight and dimensional weight — length × width × height divided by your contracted divisor. If the carrier remeasures your box even slightly larger, or applies the wrong divisor, every affected label is inflated. Bulky-but-light products (apparel, home goods, protective packaging) are hit hardest. See our deeper dive on dimensional weight.

3. Rate mismatches

The billed base charge simply doesn't match your contracted rate for that service, zone, and weight. Contracts have effective dates, tiers, and amendments; billing systems don't always keep up.

4. Invalid residential and delivery-area surcharges

Residential surcharges applied to commercial addresses, and delivery-area surcharges applied to ZIP codes that aren't on the current surcharge list. Address classification is automated and imperfect — and the fee is charged whether or not the classification was right.

5. Address-correction fees on valid addresses

A fee for "correcting" an address that was deliverable exactly as you entered it. These disputes win at a high rate when the original address validates cleanly.

6. Late deliveries eligible for refunds

Where a money-back guarantee is active for the service, a late delivery — even by a minute — can entitle you to a full refund of transport charges. The catch: claim windows are short (roughly 15 days), guarantees get suspended and reinstated by service and by period, and refunds are never automatic. Here's how the guarantee actually works.

7. Manifested-but-never-shipped labels

Labels you paid for on shipments that never received an origin scan. Common when orders are cancelled after the label prints. The charge stays on the invoice unless disputed.

Why almost nobody audits

Because doing it properly means reconciling every line against your contract, the carrier's current service guide, address-classification data, and delivery scans — inside dispute windows measured in days. That's a software problem wearing an accounting costume. It's the entire reason Sable exists.