California Code, Business and Professions Code - BPC § 10140.6

(b)(1) A real estate licensee shall disclose their name, license identification number and unique identifier assigned to that licensee by the Nationwide Multistate Licensing System and Registry, if that licensee is a mortgage loan originator, and responsible broker's identity, as defined in Section 10015.4, on all solicitation materials intended to be the first point of contact with consumers and on real property purchase agreements when acting in a manner that requires a real estate license or mortgage loan originator license endorsement in those transactions.  The commissioner may adopt regulations identifying the materials in which a licensee must disclose a license identification number and unique identifier assigned to that licensee by the Nationwide Multistate Licensing System and Registry, and responsible broker's identity.

(2) A real estate licensee who is a natural person and who legally changes the surname in which their license was originally issued may continue to utilize their former surname for the purpose of conducting business associated with their license so long as both names are filed with the department.  Use of a former surname shall not constitute a fictitious name for the purposes of Section 10159.5.

(3) For purposes of this section, “solicitation materials” include business cards, stationery, advertising flyers, advertisements on television, in print, or electronic media, “for sale,” rent, lease, “open house,” and directional signs, and other materials designed to solicit the creation of a professional relationship between the licensee and a consumer.

(4) This section does not limit or change the requirement described in Section 10236.4 as applicable to real estate brokers.

(1) Display the responsible broker's identity, as defined in Section 10015.4, without reference to an associate broker or licensee.

(2) Display no licensee identification information.