California Code, Unemployment Insurance Code - UIC § 1375

(b) The person who received the overpayment cooperates with the department in an investigation that results in the assessment of a penalty under Section 1144 or the prosecution or other action taken to impose a penalty pursuant to Section 2121.

(c) The department determines that it is in the interest of justice to waive all or part of the liability established under this section because the overpayment was a direct result of inducement, solicitation, or coercion on the part of the employer.