Cal. CCP § 585.5

(a) Every application to enter default under subdivision (a) of Section 585 shall include, or be accompanied by, an affidavit stating facts showing that the action is or is not subject to Section 1812.10 or 2984.4 of the Civil Code or subdivision (b) of Section 395.

(b) When a default or default judgment has been entered without full compliance with Section 1812.10 or 2984.4 of the Civil Code, or subdivision (b) of Section 395, the defendant may serve and file a notice of motion to set aside the default or default judgment and for leave to defend the action in the proper court. The notice of motion shall be served and filed within 60 days after the defendant first receives notice of levy under a writ of execution, or notice of any other procedure for enforcing, the default judgment.

(c) A notice of motion to set aside a default or default judgment and for leave to defend the action in the proper court shall designate as the time for making the motion a date prescribed by subdivision (b) of Section 1005, and it shall be accompanied by an affidavit showing under oath that the action was not commenced in the proper court according to Section 1812.10 or 2984.4 of the Civil Code or subdivision (b) of Section 395. The party shall serve and file with the notice a copy of the answer, motion, or other pleading proposed to be filed in the action.

(d) Upon a finding by the court that the motion was made within the period permitted by subdivision (b) and that the action was not commenced in the proper court, it shall set aside the default or default judgment on such terms as may be just and shall allow such a party to defend the action in the proper court.

(e) Unless the plaintiff can show that the plaintiff used reasonable diligence to avoid filing the action in the improper court, upon a finding that the action was commenced in the improper court the court shall award the defendant actual damages and costs, including reasonable attorney’s fees.