Abstract: A method of linking a plurality of third-party discounters to a unique customer ID in a retail sales transaction that comprises assigning a unique customer ID to a customer, creating a customer account record that is associated with the unique customer ID, and adding a plurality of registered third-party discounters to the customer account record. The method also includes processing a sale of a good in a sales transaction, identifying a registered third-party discounter associated with the good, and verifying that the customer is currently registered with the registered third-party discounter associated with the good to ensure a current eligibility of the customer. The method further includes applying a predetermined third-party discount to a gross sales price of the good to determine a net sales price for the good, and collecting a monetary value from the customer equaling the net sales price for the good.