Cal. WIC § 12306.5

(a) Any public or private agency, including a contractor under Section 12302.1, who maintains a list or registry of prospective in-home supportive services providers shall require proof of identification from a prospective provider. This identification shall be provided prior to placing the prospective provider on a list or registry or supplying a name from the list or registry to an applicant for, or recipient of, in-home supportive services. (b) For purposes of this section, proof of identification includes, but is not limited to, a positive photograph identification from a government source.