How to detect fuel card fraud?

Key signals: refueling outside operating hours, volume exceeding tank capacity, L/km well above vehicle history, refueling without NF-e, and transactions at off-route stations.

What is refueling control?

The set of policies, processes, and tools that determine who can refuel, how much, where, and with which fuel type.

What data to record per vehicle?

Per refueling: date/time, plate, station CNPJ, fuel type, liters, total amount, NF-e key, and odometer reading.

Does fuel control reduce corporate income tax?

Indirectly yes. Control ensures NF-e per refueling, enabling deduction in Lucro Real, and reduces actual fuel costs by eliminating fraud.

What technology is needed for fuel control?

The minimum: a fuel card with per-plate control and an accredited network. Odometer records and GPS integration are valuable additions but not prerequisites to start.

Fleet fuel control: reduce fraud

Camila Ribeiro — Field Operations Editor

Published: 7/30/2026 • Last reviewed: 7/30/2026 • 7 min read

How to control fuel in corporate fleets: avoid fraud, reduce waste, and guarantee NF-e per refueling.

This article is available in full in Brazilian Portuguese. Fleets without fuel control lose 10-25% of the fuel budget to fraud. Six technical controls eliminate most of the leakage.