A real estate broker within the meaning of this part is also a person who engages in the business of claiming, demanding, charging, receiving, collecting or contracting for the collection of an advance fee in connection with any employment undertaken to promote the sale or lease of real property or of a business opportunity by advance fee listing, advertisement or other offering to sell, lease, exchange or rent property or a business opportunity, or to obtain a loan or loans thereon.
Ca. Bus. and Prof'l. Code § 10131.2