[dkhenry]

If you have a child on your policy, and you have a collision on your policy, then your child will be required to be included in that policy. Insurance companies don't accept that you can live in a household, but won't be allowed to drive the new car, so they will charge you like the child is driving the new car under any circumstance.

[buffington]

My insurance company requires me to sign an affidavit affirming that my adult child will not drive a car insured by said company. If my adult child does drive my car and gets in a collision, the affidavit is used by the insurance company to absolve themselves of any financial responsibilities related to the collision.

I think it'd be reasonable aside from one obvious edge case: my adult child is blind and will never drive a car, yet I have to sign a new affidavit every time I renew my policy (every 6 months).