A affiliate marketing system and method for retail stores involves assigning a unique retail store identifier to a retail store and presenting the unique retail store identifier and a website address in conjunction with a product offered for sale in the retail store. A purchaser of the product may access the website and make a purchase. By entering the identity of the retail store, such as by entry of the unique retail store identifier or by selecting the retail store from a list, a commission for the purchase is allocated to the retail store.