Final answer:
The statement is false. It is part of best business practices to verbally communicate the return policy to the customer at the point of sale, even if it is displayed, to ensure understanding and build trust.
Step-by-step explanation:
The statement that it is not necessary to mention the return policy to the customer at the time of the sale if the return policy is clearly displayed is false. Although the return policy is displayed, best business practices suggest that it should also be communicated clearly to the customer at the point of sale. This is important to ensure that the customer understands the terms of their purchase and it helps to build trust and transparency between the customer and the business.