California Code, Code of Civil Procedure - CCP § 512.010

(1) A showing of the basis of the plaintiff's claim and that the plaintiff is entitled to possession of the property claimed.  If the basis of the plaintiff's claim is a written instrument, a copy of the instrument shall be attached.

(2) A showing that the property is wrongfully detained by the defendant, of the manner in which the defendant came into possession of the property, and, according to the best knowledge, information, and belief of the plaintiff, of the reason for the detention.

(3) A particular description of the property and a statement of its value.

(4) A statement, according to the best knowledge, information, and belief of the plaintiff, of the location of the property and, if the property, or some part of it, is within a private place which may have to be entered to take possession, a showing that there is probable cause to believe that such property is located there.

(5) A statement that the property has not been taken for a tax, assessment, or fine, pursuant to a statute;  or seized under an execution against the property of the plaintiff;  or, if so seized, that it is by statute exempt from such seizure.