Cal. Ins. Code § 11583
No advance payment or partial payment of damages made by any person, or made by his insurer under liability insurance as defined in subdivision (a) of Section 108, as an accommodation to an injured person or on his behalf to others or to the heirs at law or dependents of a deceased person because of an injury or death claim or potential claim against any person or insured shall be construed as an admission of liability by the person claimed against, or of that person's or the insurer's recognition of such liability, with respect to such injured or deceased person or with respect to any other claim arising from the same accident or event. Any such payments shall, however, constitute a credit and be deductible from any final settlement made or judgment rendered with respect to such injured or deceased person which does not expressly take into account such advance payments. Any person, including any insurer, who makes such an advance or partial payment, shall at the time of beginning payment, notify the recipient thereof in writing of the statute of limitations applicable to the cause of action which such recipient may bring against such person as a result of such injury or death, including any time limitations within which claims are required to be made against the state or any local public entity when such payments are made on behalf of such public entities. Failure to provide such written notice shall operate to toll any such applicable statute of limitations or time limitations from the time of such advance or partial payment until such written notice is actually given. That notification shall not be required if the recipient is represented by an attorney.
Ca. Ins. Code § 11583