I disagree. This "legal guidance" you are listening to is purely for the convenience of the DVLA. If you are saying that the keeper of a car is "legally" responsible for the mistakes and negligence of duty of the DVLA in recording keepership changes then I think the Court of Human Rights would have something to say about that. In English and Scottish law (and I cannot understand why a JP does not know this) "notification" takes place as soon as notice is posted. It does when a NIP is posted to a registered keeper. So it has to the other way round. As was upheld in my friend's case. The DVLA cannot make up 'law' that overrides the law of the land to hide its mistakes. That said, if you send a V5C you should send it Special Delivery or get proof of posting from the Post Office. And I agree that to avoid any unpleasantness, if you have not received an acknowledgement within 28 days, you should phone DVLA on the number in the booklet that accompanies a V5C. Do this with a phone on an account that keeps a record of your calls.