To levy upon goods in the possession of a bailee, other than one who has issued a negotiable document of title therefore, the levying officer shall personally serve a copy of the writ and notice of attachment on the bailee. (CCP 488.365, 700.060(a))
If the goods are subject to a security interest, and the plaintiff instructs the levying officer to serve the secured party, the levying officer shall serve a copy of the writ and notice of attachment on the secured party either personally or by mail. (CCP 488.365, 700.060(b))