California Code, Code of Civil Procedure - CCP § 489.410

(a) At any time after entry of judgment in favor of the defendant and before perfection of an appeal under Section 921, upon motion of the defendant, the trial court may order an increase in the amount of the original undertaking on attachment in such amount, if any, as is justified by the detriment reasonably to be anticipated by continuing the attachment. Unless such undertaking is filed within 10 days after such order, the attachment shall be set aside and the property released therefrom.

(b) If an order increasing the undertaking is made, the amount of the undertaking on appeal required by Section 921 shall be the same as the amount fixed by the trial court in such order.

(c) Neither the pendency nor granting of a motion timely filed and served by the plaintiff for vacation of judgment or for judgment notwithstanding the verdict or for new trial shall continue an attachment in force unless an undertaking is given by the plaintiff to pay all costs and damages sustained by continuing the attachment. The undertaking may be included in the undertaking specified in Section 921. If not so included, the same procedure shall apply as in case of an undertaking pursuant to Section 921.