When acting as a broker with a buyer as a customer, which of the following can the broker do?

When a broker is acting as a broker with a buyer as a customer, the broker can indeed collect a commission for the transaction. This is because the broker's role typically involves facilitating transactions between buyers and sellers. The broker earns a commission for their services, which is usually agreed upon in advance.

In scenarios where the broker is representing a buyer as a customer (as opposed to a client), the broker still has a right to earn a commission, which is commonly established in brokerage agreements or by the terms of the transaction. This compensation is a fundamental part of the broker's role in real estate transactions, ensuring that they are compensated for the expertise and services they provide.

Other options, such as signing contracts on behalf of the buyer, offering legal advice, or representing the seller, would not be appropriate actions for a broker when merely acting as a broker with a buyer as a customer, as these roles either require client representation or extend beyond the broker’s professional capacity.