Civil Code § 1748.82
CHAPTER 2. Hotel and Private Residence Rental Reservation Refunds
(a) If a consumer cancels a reservation pursuant to Section 1748.81, the hosting platform, hotel, third-party booking service, or short-term rental shall issue a refund to a consumer of all amounts paid to the hosting platform, hotel, third-party booking service, or short-term rental to the original form of payment within 30 days of the cancellation of the reservation.
(b) The refund required by this section shall include a refund of all fees charged to the consumer for optional services.