# Fleet fuel control: reduce fraud

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

**Author:** Camila Ribeiro — Field Operations Editor  
**Reviewed by:** Marina Costa — Brazilian Tax & Compliance Specialist  
**Published:** 2026-07-30  
**Updated:** 2026-07-30  
**Last reviewed:** 2026-07-30  
**URL:** https://quilometragem.com/blog/fleet-fuel-control-reduce-fraud

**TL;DR:** Fleets without fuel control lose 10-25% of the fuel budget to waste and fraud. Six technical controls eliminate most of this leakage.

- Off-network refueling is the most common fraud vector.
- Per-plate control blocks card misuse on another vehicle.
- Odometer records detect refueling incompatible with km driven.
- Per-transaction NF-e is fiscal proof and a barrier against tampering.
- Monthly L/km audit identifies anomalies before they become a pattern.

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.

## Frequently asked questions

### 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.

## Sources

- [CNT - Custos operacionais do transporte rodoviario 2024](https://www.cnt.org.br/pesquisa-custos-operacionais) — Confederação Nacional do Transporte (2026-07-20)
- [Lei 9.478/1997 - Regulamentação do mercado de combustiveis pela ANP](https://www.planalto.gov.br/ccivil_03/leis/l9478.htm) — Agencia Nacional do Petroleo, Gas Natural e Biocombustiveis (2026-07-20)