Except as authorized by permit issued pursuant to the applicable provisions of the Corporate Securities Law of 1968 (Section 25000 et seq. of the Corporations Code), no person in doing any of the acts set forth in subdivision (d) of Section 10131, subdivision (e) of Section 10131, and Section 10131.1 shall accept any purchase or loan funds or other consideration from a prospective purchaser or lender, or directly or indirectly cause such funds or other consideration to be deposited in an escrow except as to a specific loan or a specific real property sales contract or promissory note secured directly or collaterally by a lien on real property on which loan, contract or note the person has a bona fide authorization to negotiate or to sell or which has been bought and completely paid for by the licensee, or has an unconditional written contract which obligates him to purchase a specific real property sales contract or promissory note secured directly or collaterally by a deed of trust.