Transfer of Title: Help,

My question involves a consumer law issue in the State of: New Jersey

My wife and i have been seperated for about two years now. We had 3 cars, all in both our names.
the car i drive has been paid off and i have owned it long before marriage, the one she drives was financed in both our names also.
I just found out she traded the car she drives into a car dealership.
So my question is how do i prove she forged my name on the title???
Thank you
Mark

Transfer of Title: Help,