In early July 2012, enforcement officers working for the Revenue Commissioners motioned a truck driver to pull his vehicle to the side of the road near a fuel terminal in Dublin Port. It was a standard check, one of dozens the Revenue officials conducted on fuel tankers over the course of the day. Most were innocuous. The drivers merely presented invoices showing what they had purchased and who they had purchased it from, before being waved away. On this occasion, however, the paperwork did not stack up. When asked how he had paid for the load, the driver said it…