Code Civ. Proc., § 116.340

(a) Service of the claim and order on the defendant may be made by any one of the following methods:

(1) The clerk may cause a copy of the claim and order to be mailed to the defendant by any form of mail providing for a return receipt.

(2) The plaintiff may cause a copy of the claim and order to be delivered to the defendant in person.

(3) The plaintiff may cause service of a copy of the claim and order to be made by substituted service as provided in subdivision (a) or (b) of Section 415.20 without the need to attempt personal service on the defendant. For these purposes, substituted service as provided in subdivision (b) of Section 415.20 may be made at the office of the sheriff or marshal who shall deliver a copy of the claim and order to any person authorized by the defendant to receive service, as provided in Section 416.90, who is at least 18 years of age, and thereafter mailing a copy of the claim and order to the defendant’s usual mailing address.

(4) The clerk may cause a copy of the claim to be mailed, the order to be issued, and a copy of the order to be mailed as provided in subdivision (b) of Section 116.330.

(b) Service of the claim and order on the defendant shall be completed at least 15 days before the hearing date if the defendant resides within the county in which the action is filed, or at least 20 days before the hearing date if the defendant resides outside the county in which the action is filed.

(c) Proof of service of the claim and order shall be filed with the small claims court at least five days before the hearing.

(d) Service by the methods described in subdivision (a) shall be deemed complete on the date that the defendant signs the mail return receipt, on the date of the personal service, as provided in Section 415.20, or as established by other competent evidence, whichever applies to the method of service used.

(e) Service shall be made within this state, except as provided in subdivisions (f) and (g).

(f) The owner of record of real property in California who resides in another state and who has no lawfully designated agent in California for service of process may be served by any of the methods described in this section if the claim relates to that property.

(g) A nonresident owner or operator of a motor vehicle involved in an accident within this state may be served pursuant to the provisions on constructive service in Sections 17450 to 17461, inclusive, of the Vehicle Code without regard to whether the defendant was a nonresident at the time of the accident or when the claim was filed. Service shall be made by serving both the Director of the California Department of Motor Vehicles and the defendant, and may be made by any of the methods authorized by this chapter or by registered mail as authorized by Section 17454 or 17455 of the Vehicle Code.

(h) If an action is filed against a principal and his or her guaranty or surety pursuant to a guarantor or suretyship agreement, a reasonable attempt shall be made to complete service on the principal. If service is not completed on the principal, the action shall be transferred to the court of appropriate jurisdiction.