CA Civ Proc Code Section 701.580

The judgment debtor and judgment creditor together may request in writing that a sale be postponed to an agreed day and hour. The request shall be delivered to the levying officer conducting the sale, and the levying officer shall, by public declaration at the time and place originally fixed for the sale, postpone the sale to the day and hour fixed in the request. Notice of any additional postponements shall be given by public declaration by the levying officer at the time and place last appointed for the sale. No other notice of postponed sale need be given. A postponed sale shall be held at the place originally fixed for the sale.