Cal. Fin. Code § 18607
Upon receipt of the loan form the company shall promptly mail to the insured at the address shown in the agreement, or deliver to the insured personally, either a notice to the effect that the application for a loan is rejected or a copy of the agreement, thereby signifying acceptance by the company, or if the agreement contained any blank space when it was executed by or on behalf of the insured and such blank space was subsequently filled in, a copy of the agreement as so filled in and the insured shall in such event have 10 days in which to disaffirm his obligation under the premium finance agreement by giving written notice thereof to the producer and the company. In the event the agreement is not disaffirmed by the insured, the agreement shall be as binding an obligation of the insured as if the agreement were complete on its face when it was executed.
Ca. Fin. Code § 18607