Know what you should have been billed
Overbill checks your carrier invoices against your agreed rates and your own shipment records, line by line. Every discrepancy comes with the amount billed, the amount expected, the term it comes from, and the shipment behind it.
Free, and there is nothing to sign. You get the report whether or not you go on to use us.
What a finding looks like
Not a total, and not a percentage. One charge, and the reason it is wrong — in a form your finance team can put in front of the carrier.
- Shipment
- 15498823001234 · 2.4 kg · SW1A 1AA · 12 Aug
- Charge
- Residential surcharge
- Billed
- £1.45
- Expected
- £0.00
- Term
- Your agreement, clause 7.3 — waived inside the M25
- Evidence
- Delivery address is a registered business premises
- This month
- 41 lines · £59.45
An illustration, built from the same fields a real finding carries. Rule
SURCHARGE_RESIDENTIAL.
How it works
Five steps. You are involved in the first and the third, and nowhere else.
- 1
You send three things
Your carrier invoices, your rate agreement or discount letter, and a shipment export from whatever system you already use. No integration, and no change to how you ship.
- 2
We work out what you should have been billed
Your discounts come from your own agreement. The prices they apply to come from the carrier's published tariff, fuel index and surcharge schedule, which we maintain centrally per carrier per period. We never infer your rates from your invoices — that would learn a consistent overcharge as if it were correct.
- 3
You check the setup before any finding is claimed
The mapping we read from your files, the rate table we built, and the rules we derived from your contract — all on one screen, before a single discrepancy is raised. Setup errors get caught in minutes rather than in a wrong claim.
- 4
The checks run in the database
Not a model's impression. Versioned SQL rules against effective-dated reference data, so the same invoice gives the same answer months later, and any finding can be reproduced and defended.
- 5
You get a report you can act on
Every discrepancy with its evidence, the amounts, which items are still inside the carrier's dispute window, and wording you can send. You raise the claim through your own carrier relationship, or we can handle it.
Why us rather than the alternatives
We sell no labels
We are not a shipping platform, we are not a broker, and we take no commission from any carrier. The audit has nothing to gain from what you ship or who you ship it with.
We show the working
A model reads your documents once, at setup, with you confirming what it read. The checks themselves are deterministic. When the carrier pushes back, you have a clause and a shipment record, not a claim that an AI flagged it.
The price is on the page
The first audit is free. Ongoing checking is £49 a month. You keep every penny the carrier credits you, unless you ask us to run the recovery for you.
What we check today
Eight rules, and we will tell you which of them could not run on your data rather than quietly leaving them out. More are added as real invoices show what is worth checking.
| Rule | What it looks for |
|---|---|
| RATE_MISMATCH | The base charge differs from your contracted rate for that service, zone and weight band |
| FUEL_PCT | The fuel surcharge percentage differs from the published index for the period |
| WEIGHT_DIM_ADJUST | Billed weight exceeds your declared weight and dimensions, beyond tolerance |
| DUP_CHARGE | The same charge billed twice, including across invoices |
| VOID_LABEL_BILLED | Charged for a label that was voided, or that the carrier never scanned |
| SURCHARGE_RESIDENTIAL | Residential surcharge applied to a commercial address |
| SURCHARGE_REMOTE_AREA | Remote area surcharge on a postcode outside the carrier's published list |
| LATE_DELIVERY | Delivered after the service guarantee, where the service carries one |
What we do not do. We do not sell shipping, negotiate your rates, or pay your carrier invoices. We do not tell you to switch carrier. And we do not claim a percentage of what we find — see pricing.
Are your carrier invoices matching your agreed rates?
Send us one month: invoices, your rate card and a shipment export. We check the supported charges and return a report showing the discrepancies, the evidence and what may still be recoverable.