The answer is simple! In the event we do not wish to continue to licence our vehicles for use on the road, we are under an obligation in law to 'Notify' DVLA of this fact by the use of SORN. . . . . END OF! As far as I am aware, we are NOT under obligation of law to chase them or notify them if we do not receive confirmation of our SORN within 20 working days. This is just advice NOT Law. Look at form V11. Left hand side under the heading 'You can apply for a tax disc or make a SORN: 4 asterixed options exist. The fourth one say's: *by filling in this form and sending it to: The next line should be the address of your local MVL Centre (Motor Vehicle Licencing). Therefore If you do this, you have complied with the law! You have done Exactly what the form tells you to do!! Now turn the V11 over. Look at 1st Paragraph of Section A, headed: " What it means to you" It basically says that if you don't receive a letter of confirmation of your sorn from DVLA within 20 days, then contact customer services to let them know. As far as I'm aware this is NOT a legal requirement. So in short: Before you post your SORN, make a photocopy of it, write on it the date and time and location you posted it, and file it in safe place ready to defend your corner should they fail to receive your SORN Statement! In my case after pointing out these facts, I never heard another thing from them. They didn't even have the courtesy to put my mind at rest by letting me know they had dropped the case. However after nearly 2 years, I'm sure they have.