If its on retention, they do it at the same time as they register the car. There is no delay, there is no sending of forms off. Its done all at the time they register the brand new car. It doesnt get registered on a plate supplied by the DVLA, it gets registered on yours. Dealership need some serious educating. WTF have they sent the form anywhere for? They just take it to the local DVLA office with all the paperwork.