Cal. Government Code § 26908.5

(a) As used in this section “auditor” includes an elected or appointed officer or full-time employee of a county or a special district who is compensated, but does not include an independent contractor. (b) All books, papers, records, and correspondence of an auditor pertaining to the auditor’s work are public records subject to Division 10 (commencing with Section 7920.000) of Title 1 and shall be filed at any of the regularly maintained offices of the auditor. However, none of the following items or papers of which these items are a part may be released to the public by the auditor or the auditor’s employees: (1) Personal papers and correspondence of any person providing assistance to the auditor when that person has requested in writing that the person’s papers and correspondence be kept private and confidential. Those papers and that correspondence shall become public records if the written request is withdrawn or upon the order of the auditor. (2) Papers, correspondence, memoranda, or any substantive information pertaining to any audit not completed. (3) Papers, correspondence, or memoranda pertaining to any audit that has been completed, which papers, correspondence, or memoranda are not used in support of any report resulting from the audit.