Yes Mirandajane the staff do have to strike a balance and Factor is correct, most cashiers especially in smaller branches know their customers well and do all they can to protect their vunerable customers, They would certainly ask questions if they thought someone was under duress. With Investment advice, prior arrangement would be made for a customer to attend with a third party of their choice. This is usually a relative, but many decline as they are still very capable of running their own finances.