Fleet fuel theft is not random — it follows three patterns, and each one survives because a specific measurement is missing. Receipts and fuel-card statements describe what was claimed; only measured litres show what happened.
The fill was legitimate. Hours later, on a quiet stretch, fuel leaves the tank into containers. Every paper record is clean — the theft happens between the records. Fuel-card data structurally cannot see it.
The measurement that catches it: a calibrated, temperature-compensated tank-level sensor on the vehicle. A drain shows as a level drop that consumption can’t explain, flagged as it happens with GPS position, timestamp and litres.
The slip reads more litres than entered the tank; the difference is settled at the forecourt. The receipt is genuine paper for a partly fictional fill, so checking receipts against fuel-card statements proves nothing — they agree with each other.
The measurement that catches it: the measured litres of the actual fill. Hold any receipt against the tank-level rise it claims to describe and the gap is visible, fill by fill. FuelPortal’s driver app closes the loop — the driver photographs the slip, the litres are read automatically and checked against the measured fill.
A company fuel card fills a private vehicle. The transaction is real, the merchant is real, the litres are real — they just never reached a company tank. On a statement it is indistinguishable from a legitimate fill.
The measurement that catches it: every fill into a company tank is measured and time-stamped. A card transaction with no matching measured fill on any company vehicle is a ghost transaction — it has nowhere to hide.
Each pattern defeats a different single control. That is why FuelPortal reconciles four independent measurements of the same litre — what was paid for, what left storage, what the pump dispensed, and what the vehicle received and burned. A mismatch anywhere becomes an event with position, time and litres, not a month-end variance.