An Oxford comma helped a group of truck drivers win a lawsuit against their employer. They sued their company for being refused overtime pay based on a confusing state document that lists the jobs that are ineligible for overtime, which includes the “packing for shipment or distribution of” products. Because the drivers distribute but do not pack their trucks, the absent serial comma after ‘shipment’ made the sentence’s intent too vague, and they won the case. 

(Source, Source 2)