Armagh PSNI say they've been working with Revenue and Customs colleagues over the last few days.
Five vehicles have been seized by Customs for the use of illegal fuel.
One vehicle turned away from a checkpoint, but police say that the driver, much to his surprise, got a knock at the door later.
And they add they’ll "be seeing him in court".
Sharing of explicit AI images in Armagh school being investigated by police
Long-awaited inquest into death of Belfast schoolboy Noah Donohoe due to start
Murder investigation launched following death of man in Coleraine
Man arrested over threats to elected representatives
Teachers’ unions welcome pay increase while pledging to tackle workload