The is a DVLA system flaw. If a malicious person knows your registration plate and your name and a telephone number, They can erroneously claim that you are looking for a valuation. The company has been suckered because DVLA hand out "confirmation details" of your personal details, Once the number plate and surname are proactively matched by a vast number of registered private companies. Frankly, The only way to stop it is to demand DVLA stop passing your details on to all private companies, Inc