Final answer:
To inform customers of a no-refund policy for on sale or personalized items, clear signage, policy statements on receipts, verbal or written communication during checkout, including the policy online, and customer acknowledgment are effective methods.
Step-by-step explanation:
One effective method for informing customers about a store policy that excludes refunds for on sale or personalized items is to have clear and visible signage at points of sale
Additionally, this policy should be stated clearly on the receipt and during the checkout process, either by the salesperson or through an automated message for online purchases. In online settings, including the policy in the product description or in a FAQ section and requiring customers to acknowledge the policy before completing their purchase can also be very effective. To build trust and manage expectations, it is crucial that these practices are implemented consistently.