What are the consequences if a car is bought on finance and then the owna decides he/she doesnt want it n mor?

someone still has to pay for it ,either that or let it go back and ruin their credit,these days credit is too important to mess up over a car loan,there is always the option of selling it,or getting someone to take over the payments on it that would save their credit,anything beats letting one go back and getting a bad credit mark over it,good luck.