Can purchase or renew #Car Insurance for 3 months only?

Just now, I received an enquiry if it is possible to renew car insurance for 3 months only?
The potential client mentioned that his current insurer only allows him to renew his current plan by another 1 year on installment and they will only refund 80% of the premium if he cancel the policy after 3 months.

I understand that NTUC can do less than 1 year if it is for a resale car, such that the car insurance policy expiry date coincides with the road tax due date. For example, the car was registered on 18 Sep 2010, then the new start date of the car insurance period for the resale car can be from today 18 Feb 2014 and expires on 17 Sep 2014 (7 months policy only), hence, it coincide with the roadtax due date.

But not for this renewal case.