Section 5638 Of Article 4. Expense Of Abatement From California Food And Agricultural Code >> Division 4. >> Part 1. >> Chapter 7. >> Article 4.

. If the address of the encumbrancer is unknown to the commissioner, he shall state in the copy of the notice that the address is unknown to him and shall mail the copy addressed to the encumbracer at the county seat of the county in which the property is situated.