What about "numbered" accounts?

The procedure for opening a “numbered” account is exactly the same as for any other type of account. The bank must verify your identity and establish the identity of the beneficial owner. With a “numbered” account your business at the bank is carried out not under your name but under a number or code. This is simply an internal security measure to restrict knowledge of the customer's identity to a small group of employees and apart from this a “numbered” account enjoys no additional privileges in terms of confidentiality.