What Is an Accounts Payable Recovery Audit, and Why Fleet Maintenance Is the Vertical No One Audits

An accounts payable recovery audit checks what a company paid against what it agreed to pay, and returns the difference. It is a proven, decades-old discipline in freight, parcel, telecoms and retail, and it has never once been applied to the invoices fleets pay for vehicle repairs. This is why, and what changes it.

What an accounts payable recovery audit actually is

Every large organisation pays thousands of invoices it never fully checks. Not out of carelessness, but out of volume. When a company runs 75% of its spend through outside suppliers, no accounts-payable team can line-check every invoice against every contract, price list and prior payment. So a residue of errors slips through: duplicate payments, prices that don't match the agreed rate, credits never taken, contract terms never enforced.

An accounts payable recovery audit (also called an AP recovery audit or profit recovery audit) is a systematic, after-the-fact review of paid invoices against their supporting agreements. A specialist, often working purely on contingency, taking a share of what they recover and charging nothing if they find nothing, mines the payment history, isolates the overpayments, documents each one against the contract that governs it, and helps claw the money back from the supplier.

It is, in one line: proof that you overpaid, priced and cited, turned into cash returned.

The entire model rests on one uncomfortable fact: the money was already spent, correctly recorded, and approved. And it was still wrong. Good controls reduce the residue. They never eliminate it.

What a recovery audit typically finds

The findings fall into a handful of repeatable buckets:

Finding	What it is
Duplicate payments	The same invoice paid twice: different reference, same money.
Pricing errors	Billed at a rate above the contracted or quoted price.
Missed credits & rebates	Volume rebates, returns and credit notes never applied.
Contract non-compliance	Terms in the agreement (discounts, caps, allowances) never enforced.
Statement discrepancies	Balances the supplier owes back, sitting unreconciled.

Across industries, duplicate and erroneous payments alone run to roughly 0.8–2% of disbursements, and studies routinely find companies lose 5–10% of profit to procurement and payment errors. On a large supplier book, a fraction of a percent recovered is still millions returned. That is why the recovery audit industry exists at all, and why its clients keep renewing.

Why it works best where invoices are structured

Recovery audit thrives in verticals with one thing in common: the overcharge is arithmetic, and the supplier is compelled to pay it back.

• Freight audit and payment recovers 3–8% of freight spend. A freight bill is a tariff times a weight times a zone. The error is provable in a single line, and the carrier is a large, repeat vendor who honours a documented billing error with a credit note because the relationship continues.
• Parcel audit routinely claws back around 5% on the same logic.
• Telecom, utility and AP audits work because every charge maps to a rate card, a unit price, a three-way match.

In each case the question ("is this line correct?") has a factual, arithmetic answer, and the counterparty is structurally obliged to return the difference. That is the water recovery audit swims in.

The one vertical it has never touched: fleet repair

Now consider the invoices a fleet pays to keep its vehicles running: the repair, the roadside call, the part, the labour hour, the warranty job. Thousands of them, from hundreds of independent workshops and dealers, authorised by phone and email, across a country.

No one runs a recovery audit on them. Not because the money is clean (every structural sign says the opposite) but because fleet repair breaks both of the conditions recovery audit depends on:

1. The comparison is semantic, not arithmetic. "Was 4.2 hours reasonable for this repair?" is a judgement, not a lookup. There's often no unit price list, no goods-receipt, no three-way match. The entitlement lives in an unstructured agreement, a warranty booklet, a rate exhibit, not a tariff.
2. The counterparty isn't compelled to pay. The independent workshop may not have the money, may simply decline, and is the same shop you need next week for the truck that's down. The leverage a freight auditor has over a national carrier isn't there.

So the leakage in fleet maintenance was, historically, both hard to detect and hard to collect, and an industry never formed around it. The absence of a fleet-repair audit business has never been evidence that the money is clean. It's evidence that, until now, no one could reach it.

What changes it

Two things make fleet repair auditable for the first time.

Machine-readable invoices. Across a growing list of countries, e-invoicing mandates now compel every supplier, down to the two-bay garage, to send structured, line-itemised invoices. The single hardest part of a fleet audit, getting the data, is being solved by legislation.

Machine-readable authority. When the authorisation a fleet already granted (the work order, the rate card, the warranty terms) is turned into rules the software can read, the semantic question becomes an arithmetic one again: this billed line versus the line that was authorised. The comparison recovery audit needs, restored.

That is exactly what Korrex does: it reads the agreements a fleet already has and checks every repair invoice against them. Pricing, labour, parts, and the warranty that should have made the repair free, before the money clears, and after, on the invoices already paid.

What a fleet recovery audit surfaces

The buckets look familiar, with one the other verticals don't have:

• Warranty leakage — repairs billed to the fleet that an active warranty already covered. Fleets without structured tracking recover well under half of what they're owed; a large share of eligible repairs goes unclaimed every year. This is the cleanest recovery of all: the manufacturer pays it, and it's arithmetic.
• Parts-markup breach — a part billed above the contracted margin.
• Labour padding — more hours billed than the job takes, or inspections that never happened.
• Unauthorised scope — work billed that was never approved.
• Duplicates, tax and math errors — the same residue every AP book carries.