e notices required by the preceding section may be served, (a) By delivering a copy to the tenant personally; or,
(b) If he be absent from his place of residence, and from his usual place of business, by leaving a copy with some person of suitable age and discretion at either place, and sending a copy through the mail addressed to the tenant at his place of residence; or,

(c) If such a place of residence and business cannot be ascertained, or a person of suitable age or discretion there cannot be found, then by affixing a copy in a conspicuous place on the property, and also delivering a copy to a person there residing, if such person can be found; and also sending a copy through the mail addressed to the tenant at the place where the property is situated. Service upon a subtenant may be made in the same manner.

SOURCE: CCP § 1162.