If you are cancelling mid-term, then yes there is a release you have to sign. Otherwise, if it's a renewal that hasn't started yet, a release is not needed. Just a note or a call, or just don't pay your premium.
A release does not absolve the carrier of liability for a claim that may have already happened. It's just an acknowledgement that you want coverage to cease before your next renewal date.
A release does not absolve the carrier of liability for a claim that may have already happened. It's just an acknowledgement that you want coverage to cease before your next renewal date.