• A service station has been inspected for allegedly supplying subsidized diesel to unauthorized vehicles.

• Among the vehicles reported were high-horsepower trucks allegedly used with fuel subject to a reduced tax rate.

May 27, 2026. Customs Surveillance officials from the Tax Agency in Guadalajara and agents from the Civil Guard Command of Guadalajara have carried out an operation against fraud in the field of hydrocarbons which has resulted in the detection of a gas station that would have supplied subsidized type B diesel to unauthorized vehicles. In addition, nearly a dozen violations were detected in passenger cars and the fraudulent use of diesel in a high-horsepower tax truck.

The operation was carried out by officials from the Guadalajara Operational Unit of Customs Surveillance and members of the Fiscal and Border Service Detachment of the Civil Guard of Guadalajara, after obtaining information about possible irregularities in the marketing of fuels at a service station in the province.

During these operations, the investigators carried out direct checks on vehicles by extracting small samples of fuel from the tanks to verify if they were using subsidized diesel of type B or C, intended exclusively for agricultural uses or certain authorized sectors.

This fuel is distinguished by its characteristic reddish hue, which allows for an initial visual identification that is subsequently confirmed through analysis in accredited laboratories. The collected samples are sealed and sent to the Customs and Special Taxes Department of the Tax Agency in Guadalajara for analysis and administrative processing.

As a result of these actions, nearly a dozen violations were detected in passenger cars. Fraudulent use was also detected in a high-horsepower tax truck. They were all reported for violations of the Special Taxes Law for using subsidized diesel in unauthorized vehicles.

In relation to the service station, the facts could constitute a serious or very serious infringement as defined in Law 38/1992, on Special Taxes. Furthermore, it could be violating supplementary regulations regarding the control of hydrocarbons and the distribution of petroleum products.

These devices are part of a strategy aimed at strengthening oversight of special taxes on hydrocarbons and preventing practices that create unfair competition among sectors authorized to use these types of fuels.