Cooling off period and cancelling this policy Federal law lets you cancel your policy within 21 days of its purchase. Just Car also lets you cancel your policy at any time. In both cases, so long as you haven’t made a claim, we will refund you the unexpired portion of the risk premium component of your total premium, as well as a pro-rata refund of any taxes and charges to which you are entitled to by law, less a $30 processing charge. To cancel your policy, please call us on 13 13 26. We can only cancel your policy by giving.