California Code, Probate Code - PROB § 2333

(a) In case of a breach of a condition of the bond, an action may be brought against the sureties on the bond for the use and benefit of the ward or conservatee or of any person interested in the estate.

(b) No action may be maintained against the sureties on the bond unless commenced within four years from the discharge or removal of the guardian or conservator or within four years from the date the order surcharging the guardian or conservator becomes final, whichever is later.

(c) In any case, and notwithstanding subdivision (b) of Section 2103, no action may be maintained against the sureties on the bond unless the action commences within six years from the date the judgment under Section 2103 or the later of the orders under subdivision (b) of this section becomes final.