Does the borrower need actual notice to have a valid foreclosure?
No. The non-judicial foreclosure sections of the California Civil Code were designed to balance the needs of the borrower and lender. The procedure is supposed to be clear and easy to follow so that there is little reason to go into court to argue issues. The notification procedure provides many opportunities for the borrower to receive notice. If they do not make the effort to keep the lender of the trustee informed, they may lose their property without notice. The trustee has no obligation to search for a lost borrower. The borrower can give constructive notice with their current address. See I.E. Assocs., v. Safeco Title Ins. Co. (1985) 39 C3d 281, 216 CR 438.