California Business And Professions Code Section 6149.5

(a) Upon the payment of one hundred dollars ($100) or more in settlement of any third-party liability claim the insurer shall provide written notice to the claimant if both of the following apply: (1) The claimant is a natural person. (2) The payment is delivered to the claimant`s lawyer or other representative by draft, check, or otherwise. (b) For purposes of this section, written notice includes providing to the claimant a copy of the cover letter sent to the claimant`s attorney or other representative that accompanied the settlement payment. (c) This section shall not create any cause of action for any person against the insurer based upon the insurer`s failure to provide the notice to a claimant required by this section. This section shall not create a defense for any party to any cause of action based upon the insurer`s failure to provide this notice.