Final answer:
A separate written consent agreement is needed in addition to the signed loan consent when a customer has fully paid for the stock and a business wants to loan it out. This agreement clarifies the terms of the loan and provides legal protection for both parties.
Step-by-step explanation:
When a customer has fully paid for the stock and a business wants to loan it out, a separate written consent agreement is generally required alongside the signed loan consent. This additional agreement helps to ensure that both parties are clear on the terms of the loan and the use of the stock as collateral. It provides legal protection for both the customer and the business in case of any disputes or issues arising from the loan.