Cal. Welf. & Inst. Code § 12305.83

(a) When it has been determined that a provider of supportive services participating under this chapter has received an overpayment that is a debt due and owing, as defined in subdivision (g) of Section 14043.1, the director or the county may, to the extent permissible under existing labor laws, recover the overpayment by offset against any amount currently due to a provider under the provisions of this chapter, Chapter 7 (commencing with Section 14000) or Chapter 8 (commencing with Section 14200) or by means of a repayment agreement executed between the provider and the director or the county, or by filing a civil action.
(b) The department, in consultation with the entities listed in Section 12305.72, shall identify, define, and develop policies, procedures, and applicable due process requirements under which overpayments to supportive services providers will be identified and recovered.
(c) If it is determined that an overpayment to a supportive services provider has occurred the county shall:
1. (1) Take all appropriate actions to recover the full amount of the overpayment by any combination of the following actions:
  1. (A) Offsetting the overpayment from any future warrants to that provider for services provided to any recipient of services pursuant to subdivision (d).
  2. (B) Entering into a negotiated repayment agreement.
  3. (C) Filing a civil court action.
2. (2) If the overpayment was determined to have occurred as a result of fraud on the part of the supportive services provider, take all appropriate actions to suspend or exclude the provider as an enrolled provider and to prevent in the future any further payment of state or federal funds to the provider for up to 10 years following the conviction or the term of incarceration following the conviction for fraud.
(d) If the overpayment described in this section was determined to be the result of fraud, the full amount of the overpayment may be offset, in total, from any future warrants, as described in paragraph (1) of subdivision (c). If the overpayment is not determined to be the result of fraud the offset shall be limited to either of the following:
1. (1) The amounts provided for in a repayment agreement negotiated with the provider.
2. (2) No more than 5 percent of each warrant, for errors caused by the government and no more than 10 percent of each warrant, for errors resulting for any other reason, until the full or negotiated amount is recovered.