My husband thought that he was co-signing for his son's car. It turns out that they made my husband the primary loan holder but the dealership only put his son's name on the title. 

His son is now in legal trouble and he will be unable to make the payments. We are now responsible for the loan on a car that we can't drive. Is this legal?

I am not asking about the difference between primary and co-signer. I was asking if anyone knew if the dealership has a legal obligation to put the primary loan holder on the title because in Ohio only the owner of a vehicle can purchase the yearly tags. I am fully aware that the loan is our responsibility. I