An electronic registration system which facilitates authorized product returns and reduces the incidence of improper returns. A retailer sales associate is prompted to enter individual product identification information such as an individual serial number. This individual product identification information is then stored in a data base along with the date on which the product was sold and an appropriate UPC code, SKU number or manufacturer code. A check digit algorithm may be used to verify the serial number prior to storage. A sales receipt may be imprinted with at least the date of the transaction and the serial number. When a product is returned, the retailer may cross-reference the serial number on the product with that on the receipt to verify the sales receipt. Otherwise, the database may be searched for pertinent sales information.