Cal. Civ. Proc. Code § 873.720

(a) A purchaser, the referee, or any party may move the court to confirm or set aside the sale.
(b) The moving party shall give not less than 10 days’ notice of motion to:
1. (1) The purchaser if the purchaser is not the moving party; and
2. (2) All other parties who have appeared in the action.