Cal. Veh. Code § 5604
Every dealer who, upon transferring by sale, lease, or otherwise, any new or used vehicle of a type subject to registration, requires the transferee to insure the vehicle, and every lending agency which, as the holder of any security interest in the vehicle, requires its obligor to insure the vehicle, shall, if the required insurance policy is obtained by the dealer or lending agency and the policy does not insure the transferee or obligor against damages resulting from ownership or operation of the vehicle arising by reason of personal injury or death of any person, or from injury to property, notify the transferee or obligor of that fact in writing on a document other than the insurance policy. The document shall be in duplicate and signed by the transferee or obligor.
If the required insurance policy is obtained by the dealer or lending agency because of the failure or refusal of the transferee or obligor to furnish or renew insurance in accordance with the terms of the contract of sale or the security agreement, and the policy does not insure the transferee or obligor against damages resulting from ownership or operation of the vehicle arising by reason of personal injury or death of any person, or from injury to property, the dealer or lending agency shall notify the transferee or obligor that the policy obtained does not insure the transferee or obligor for liability from any claims. The notice shall be made in writing on a document other than the insurance policy, or the declaration page attached to the policy, and shall be mailed, with postage paid and properly addressed, to the transferee or obligor within 30 days of obtaining the policy.
Ca. Veh. Code § 5604