California Code, Code of Civil Procedure - CCP § 701.550

(a) In addition to the notice of sale required by this article, the levying officer shall, at the time notice of sale is posted pursuant to Section 701.530 or 701.540, mail notice of sale to any person who has requested notice of the sale pursuant to this section.

(b) A request for notice of sale under this section made prior to the issuance of the writ shall be in writing and shall be filed with the clerk of the court where the judgment is entered. The request shall specify the title of the court, the cause and number of the action in which the judgment was entered, and the date of entry thereof, and shall state the address to which the notice of sale is to be mailed. The name and address of the person requesting notice of sale under this subdivision shall be noted on the writ.

(c) A person who desires notice of sale of particular property that has been levied upon may file a request for notice of sale with the levying officer who will conduct the sale. The request shall contain the information specified by the levying officer as needed in order to comply with the request.