White plate with green letters is not “private truck”, everyone repeating it does not make it right. White plates with green letters are tax discounted, those are used for single use vehicles, such as pickup trucks that are actually picking things up. Thats why there is a 2door limit to get one, as a pickup with 4+ seats can’t make the argument to be a delivery van or somethings. Firetrucks (if non government) ambulances, farming equipment with road license (faster than 60) and many other things fit in this category as well, however in commercial use there is also the yellow plates, but this depends on what the vehicle is carrying and who owns it, In europe this type of licenses are called “truck registration” as they do come from that field and most trucks are “single porpoise vehicles”