No car can leave USA if it has a lien on it. What does this mean? Your car must be paid in full. The only people who can ship a car overseas and still carry a lien on the car are US Military and Government employees/contractors. For those people a letter of authorization from the lender will need to be issued to pass US Customs. Otherwise the car may be considered stolen. A clear Title of Ownership with no Liens on the Title.
If you bought a car new, then your name must be listed on the front of the Title as the registered owner. If the vehicle has been sold, then both the Seller and Buyer have to sign the back of the Title in the spaces as detailed on the back of the Title. For safety reasons, the vehicle cannot have more than a 1/4 tank of gas.