Problem with changing banking details

<p>My wife bought a Daihatsu Sirion Sport through Nedbank MFC up to now the installment was going off my account i'm not the registered owner of the Vehicle when i requested for the banking details to be changed a third party debit form was sent to me requesting a certified copy of her bank statement and id now i can understand Authorization must be obtained but its not a new vehicle shes buying that has been done im not the registered owner if its not changed Nedbank Won't get theire installment </p>