What should I do if my license plates are lost, destroyed or stolen? Do I have to forfeit the registration to the DMV?
yes. you need to report plates that are lost, stolen or destroyed and surrender the registration in these causes the dmv can issues you a new registration and plates
Sure, I would also like to know how you determine the amount that is given in the refund?
for example, you paid 137.50$ to register your vehicle for two years. In the amount of money you paid is included 62.50$ for the two years registration, that is 31.25$ per year, there's also included 50$ for the tittle certification and the final 25$ is for the vehicle registration.