If my car is in my name can i have someone else insure me under their policy?

Probably, some companies only require that you have care custody and control of the vehicle in order to be the named insured. Other companies require that you be the registered owner. The problem...

Depending on the state you must at least cosign.

Yes. You cannot insure anything that you do not own. If you do it is material misrepresentation, voids the contract, and could lead to criminal charges of insurance fraud. The biggest problem is that...

no