California Code, Unemployment Insurance Code - UIC § 4751

(a) In the absence of fraud, misrepresentation, or willful nondisclosure, the notice of overpayment of federal-state extended benefits shall be served by the Employment Development Department not later than one year after the close of the extended benefit period in which the overpayment was made.

(b) The Director of Employment Development may offset an overpayment of extended duration benefits, or federal-state extended benefits, or unemployment compensation benefits against any of such three types of benefits or against disability benefits to which the liable person may become entitled under this division. The Director of Employment Development may offset the amount of any such overpayments within any of the periods prescribed by subdivision (b) of Section 1379, and further within the current extended duration period or current extended benefit period or any extended benefit period or extended duration period which begins during the three-year period next succeeding the date of the service of such notice of overpayment.