Claims on multi car policies are usually dealt with similarly to single car policies. All multi car policies are different so it’s important to check with your insurer, but the best multi car insurance policies will not penalise one driver if another makes a claim. If someone else on the policy makes a claim, for example if your partner makes a claim on their car, your no claims bonus will not be affected.
Auto insurance is financial protection, and not just for the investment you made when you bought your car. After a really serious accident, bills for damage and injuries can easily reach into hundreds of thousands of dollars. If you happen to cause such a wreck, the victims could sue you. In the worst case scenario, assets such as your savings and home could be seized.