California Code, Health and Safety Code - HSC § 122227

(a) A contract entered into on or after January 1, 2026, to transfer ownership of a dog, cat, or rabbit to a purchaser that is offered, negotiated, brokered, or otherwise arranged by a person, pet dealer, or business while the purchaser is located in California is void as against public policy if the contract includes or requires a nonrefundable deposit.

(b) If money is exchanged pursuant to a contract that is void pursuant to this section, the seller shall refund the money to the purchaser within 30 days of receiving notice that the contract is void pursuant to this section without expectation of return of the contract subject.