Cal. Unemp. Ins. Code § 1875
(a) If an offer under Section 1870 to accept partial payment in satisfaction of the liability has been accepted, and it is subsequently determined that any person willfully did any of the following, the acceptance shall be rescinded and all compromised liabilities shall be reestablished without regard to any statute of limitations that is applicable to this division:
(c) For all rescissions under subdivision (a), the department shall notify the employer or individual who previously submitted the offer in compromise in writing of both of the following: