California Code, Business and Professions Code - BPC § 25610

(a) Any person who erases, removes, obliterates, destroys, or renders illegible in any manner any serial numbers, stamps, marks, brands, legends, or other information required by federal or state law to be attached or placed upon any packages or original cases containing alcoholic beverages, before the contents of such packages or cases have been entirely removed, is guilty of a misdemeanor.

(b) Any licensee who possesses any original unopened package or case containing alcoholic beverages on which or from which any serial number required by federal or state law to be attached or placed has been erased, removed, obliterated, destroyed, or rendered illegible in any manner, is guilty of a misdemeanor.