A device for verifying guidance orders includes a passivation device for implementing comparisons between guidance orders from at least three different equipments in order to generate a passivated guidance order. For example, one of the guidance orders may be an auxiliary guidance order used to compare to the other two primary guidance orders so that the primary guidance order that is closest to the auxiliary guidance order is selected as the passivated guidance order. The passivated (e.g., validated) guidance order is transmitted to a flight control system of the aircraft.