Cal. Civil Code § 1786.40

(a) Whenever insurance for personal, family, or household purposes, employment, or the hiring of a dwelling unit involving a consumer is denied, or the charge for that insurance or the hiring of a dwelling unit is increased, under circumstances in which a report regarding the consumer was obtained from an investigative consumer reporting agency, the user of the investigative consumer report shall so advise the consumer against whom the adverse action has been taken and supply the name and address of the investigative consumer reporting agency making the report. (b) Whenever insurance for personal, family, or household purposes involving a consumer is denied or the charge for that insurance is increased, either wholly or in part because of information bearing upon the consumer’s general reputation, personal characteristics, or mode of living, that was obtained from a person other than an investigative consumer reporting agency, the consumer, or another person related to the consumer and acting on the consumer’s behalf, the user of the information shall, within a reasonable period of time, and upon the consumer’s written request for the reasons for the adverse action received within 60 days after learning of the adverse action, disclose the nature and substance of the information to the consumer. The user of the information shall clearly and accurately disclose to the consumer his or her right to make this written request at the time the adverse action is communicated to the consumer.