Cal. Civ. Proc. Code § 1565

Any property delivered to the Controller pursuant to this chapter that has no apparent commercial value shall be retained by the Controller for a period of not less than seven years from the date the property is delivered to the Controller. If the Controller determines that any property delivered to him or her pursuant to this chapter has no apparent commercial value, he or she may at any time thereafter destroy or otherwise dispose of the property, and in that event no action or proceeding shall be brought or maintained against the state or any officer thereof, or against the holder for, or on account of any action taken by, the Controller pursuant to this chapter with respect to the property.