How can you get back the license plates of a repossessed vehicle to cancel your registration?
If you are trying to cancel your car registration and want to
give your license plates back to the DMV all you need to do is go
to DMV and fill out affidavit that your vehicle has been
repossessed because you have the plates to surrender.
Otherwise, just call all the impound lots in your county see if
they have your vehicle and ask them when can you retrieve your
personal belongings and plates from your vehicle.