Cal. Civ. Proc. Code § 699.550

In any case where property has been levied upon and, pursuant to a levy, a copy of the writ of execution and a notice of levy are required by statute to be posted or to be served on or mailed to the judgment debtor or other person, failure to post, serve, or mail the copy of the writ and the notice does not affect the execution lien created by the levy. Failure to serve on or mail to the judgment debtor a list of exemptions does not affect the execution lien created by the levy.