Cal. Civ. Proc. Code § 720.240
(a) Not later than five days after the third-party claim is filed with the levying officer, the levying officer shall serve the following personally or by mail on the creditor:
(4) If the third person has not filed an undertaking to release the property, a notice that the property will be released unless, within the time allowed as specified in the notice, the creditor does one of the following: