CA Civ Proc Code Section 1268.220

(a)

The plaintiff shall serve a copy of the order for possession upon each defendant and his attorney, either personally or by mail:

(1)

At least 30 days prior to the date possession is to be taken of property lawfully occupied by a person dwelling thereon or by a farm or business operation.

(2)

At least 10 days prior to the date possession is to be taken in any case not covered by paragraph (1).

(b)

A single service upon or mailing to one of several persons having a common business or residence address is sufficient.