Insurer, and Vehicle Excise Duty (VED) / licence data, are shared by the relevant authorities including the Police and this forms an integral part of the mechanism of CIE. All UK registered vehicles, including those that are exempt from VED (for example, Historic Vehicles and cars with low or zero emissions) are subject to the VED taxation application process. Part of this is a check on the vehicle's insurance. A physical receipt for the payment of VED was issued by way of a paper disc which, prior to 1 October 2014, meant that all motorists in the UK were required to prominently display the tax disc on their vehicle when it was kept or driven on public roads. This helped to ensure that most people had adequate insurance on their vehicles because insurance cover was required to purchase a disc, although the insurance must merely have been valid at the time of purchase and not necessarily for the life of the tax disc. To address the problems that arise where a vehicle's insurance was subsequently cancelled but the tax disc remained in force and displayed on the vehicle and the vehicle then used without insurance, the CIE regulations are now able to be applied as the Driver & Vehicle Licence Authority (DVLA) and the MID databases are shared in real-time meaning that a taxed but uninsured vehicle is easily detectable by both authorities and Traffic Police. From 1 October 2014, it is no longer a legal requirement to display a vehicle excise licence (tax disc) on a vehicle. This has come about because the whole VED process can now be administered electronically and alongside the MID, doing away with the expense, to the UK Government, of issuing paper discs.
Teenage drivers who have no driving record will have higher car insurance premiums. However, young drivers are often offered discounts if they undertake further driver training on recognized courses, such as the Pass Plus scheme in the UK. In the US many insurers offer a good-grade discount to students with a good academic record and resident-student discounts to those who live away from home. Generally insurance premiums tend to become lower at the age of 25. Some insurance companies offer "stand alone" car insurance policies specifically for teenagers with lower premiums. By placing restrictions on teenagers' driving (forbidding driving after dark, or giving rides to other teens, for example), these companies effectively reduce their risk.
In New South Wales, each vehicle must be insured before it can be registered. It is often called a 'greenslip,' because of its colour. There are six licensed CTP insurers in New South Wales. Suncorp holds licences for GIO and AAMI and Allianz holds Allianz and CIC Allianz licences. The remaining two licences are held by QBE and NRMA Insurance (NRMA). APIA and Shannons and InsureMyRide insurance also supply CTP insurance licensed by GIO.