Cal. Civil Code § 3080.17

Except as otherwise agreed or specified by order of court, notice of sale shall be given as follows: (a) A notice in writing of the date, time and place of sale shall be delivered personally or be deposited in the United States mail, postage prepaid, addressed to the owner of the livestock, at his last known address, and to any other person claiming a lien upon or security interest in the livestock, who had on file with the California Secretary of State on the date the lien arose a financing statement covering the livestock for which livestock services secured by the lien were provided at least five days before the date fixed for any public sale or before the day on or after which any private sale or other disposition is to be made. (b) Notice of the time and place of a public sale shall also be given at least five days before the date of sale by publication once in a newspaper of general circulation published in the county in which the sale is to be held. If there is no such newspaper, notice shall be given by posting, for five days prior to sale, a notice of sale where the sale is to be conducted.