Are you considering upgrading your vehicle but want to keep your registration number? Have you bought another private number plate but want to keep your old one too? If you are in a situation like this and are confused about what to do, why not put your registration on “retention” document. Retaining number plates is a facility which enables registration numbers to be taken off vehicles and kept on a V778 document, commonly known as a retention certificate. A V778 is a green certificate that is issued by the DVLA when a registration number is transferred off a vehicle. Your registration can be held on retention document indefinitely and can be renewed on an annual basis for £25 per year. You are able to sell the registration number whenever you wish to, this enables you to keep the registration and buy a new number plate to put on your vehicle.