I just purchased the car from my friend, he had to go back to UK. His paper for the car was on his name - matricula, insurance: we signed both bill of sale and matricula on the back side without attorney; and I really don't have a glue Where I should to go to pay transfer tax and change matricula to my name and How soon it should be done: in week, month? Am I (again) in trouble? I really appreciate if anyone can explain for me my next steps.