California Code, Civil Code - CIV § 3344.6

(a) Any candidate for elective office whose election or defeat is expressly advocated in any campaign advertisement which violates subdivision (a) of Section 115.2 of the Penal Code shall have a civil cause of action against any person committing the violation.

(b) If a mass mailing or other printed matter which violates subdivision (a) of Section 115.2 of the Penal Code expressly advocates the election or defeat of more than one candidate, only the candidate or candidates to whom the misstatement or misrepresentation directly relates shall have a civil cause of action pursuant to this section.

(c) Any person bringing a cause of action pursuant to this section may recover damages in an amount of two times the cost of the communication, but not to exceed fifty thousand dollars ($50,000).