Cal. Bus. & Prof. Code § 7534

Every advertisement by a licensee soliciting or advertising business shall contain his or her business name, business address or telephone number, and license number as they appear in the records of the bureau. For the purposes of this section, “advertisement” shall include any business card, stationery, brochure, flyer, circular, newsletter, fax form, printed or published paid advertisement in any media form, or telephone book listing. Every advertisement by a licensee soliciting or advertising their business shall contain his or her business name, business address or telephone number, and license number, as they appear in the records of the bureau.