At Number Plate Maker they certainly do in tiny writing at the bottom of the plates.  Number Plate Genie is registed with the DVLA. This is a legality  as it means the police or authorities can check if they are genuine and your vehicle will pass the MOT check. We do not use this for advertising that’s why we keep it so small. All our 2D Plates, 3D Gel Plates and 4D Plates include legal details.