What sales-promotion technique involves returning part of the price to the customer?

The sales-promotion technique that involves returning part of the price to the customer is known as a rebate. A rebate is a form of sales promotion where the customer pays the full price at the time of purchase but is later reimbursed a portion of that price. This process encourages consumers to make a purchase by providing an incentive that can enhance perceived value and stimulate sales.

In contrast, a discount applies directly at the point of sale, reducing the initial price of the product at the time of purchase. Cash back typically refers to a method used in credit card transactions or specific promotions where a percentage of the purchase amount is returned to the customer immediately, but it doesn't specifically relate to a promotional offer tied to a product purchase like a rebate does. Coupons provide a deduction from the selling price at the time of purchase but do not involve a reimbursement process after the purchase, making rebate the most fitting term for the technique described.