For purposes of confidentiality, a customer wants to open an account designated by number only.

A numbered account is permitted if the firm maintains proper ownership records and obtains the required customer acknowledgment. The account may be identified internally or on certain documents by number for confidentiality, but the broker-dealer must still know the customer’s true identity and maintain appropriate books and records. The registered representative must obtain a signed statement from the customer accepting ownership of the numbered account. Choice D is correct. Choice A is incorrect because numbered accounts are not categorically prohibited under SEC rules. Choice B is incorrect because anti-money laundering and customer identification obligations do not prohibit all numbered accounts; they require the firm to identify and verify the customer. Choice C is incorrect because tax returns are not the required document for opening a numbered brokerage account. The SIE outline includes anti-money laundering, customer account information, books and records, privacy, and customer protection topics. It also lists FINRA Rule 3250, Designation of Accounts, and FINRA Rule 4512, Customer Account Information, as relevant rules. The technical issue is confidentiality without anonymity: the firm may use a number, but it must document beneficial ownership. Reference: Section 3.2.3 AML; Section 3.2.4 Books and Records; FINRA Rules 3250 and 4512.