This section is for the buyer to complate if it is a private sale
Note that some details, including driver number, are not required by law
For your own protection I advise you to send the documents to DVLA by special delivery, or recorded delivery so that you get a receipt from the mail, as it is up to you to prove you sent them if, as sometimes happens, the DVLA make a mess up
If you part exchange or sell to a garage or motor dealer ensure that you send these documents to DVLA. Do NOT rely on the motor dealer to "do it for you"