Cal. Civ. Proc. Code § 425.50
(a) An allegation of a construction-related accessibility claim in a complaint, as defined in subdivision (a) of Section 55.52 of the Civil Code, shall state facts sufficient to allow a reasonable person to identify the basis of the violation or violations supporting the claim, including all of the following:
(4)
(A) Except in complaints that allege physical injury or damage to property, a complaint filed by or on behalf of a high-frequency litigant shall also state all of the following:
(b)
(c) A complaint alleging a construction-related accessibility claim shall be signed by at least one attorney of record in the attorney’s individual name, or, if the party is not represented by an attorney, shall be signed by the party. By signing the complaint, the attorney or unrepresented party is certifying that, to the best of the person’s knowledge, information, and belief, formed after an inquiry reasonable under the circumstances, all of the following conditions are met: