When doing business with the client, follow the rule on disclosures! The opinion can be found here for 120 days. (h/t: California Attorneys Fees Blog)
"In this case, we consider whether an attorney who entered into very successful business transactions with his clients, but did not provide them the written disclosures required under rule 3-300, was properly denied leave to amend his complaint to state a cause of action for the reasonable value of his services. We shall conclude the trial court did not err in concluding that the attorney’s fiduciary breach precluded such recovery."