PCO stands for the Public Carriage Operator. The Department of Transport for London (TfL) are responsible for awarding private-hire licenses to mini cab drivers in London. The PCO license is crucial as you cannot legally work or be hired without one and you can face a huge fine if you work without a badge. Each badge lasts for three years and at the end of the three years the badge can be renewed. The PCO license allows individuals to work for any private hire companies such as Uber, Addison Lee and mini-cab offices. The badge is also required for any private chauffeuring work which involves carrying passengers.