California Code, Corporations Code - CORP § 29201

Every person shall, upon written demand therefor, furnish to any customer or principal for whom he has executed any order for the actual purchase or sale of any securities or commodities on any board of trade or exchange, either for immediate or future delivery, a written statement showing the name of the person from whom the property was bought or to whom it was sold, as the case may be, and the time when, place where, and the price at which it was either bought or sold. If any such person refuses or neglects to furnish such a statement within forty-eight hours after such demand, the refusal or neglect is prima facie evidence that the transaction was bucketing or bucket shopping within the terms of this division.