Most retailers follow these basic privacy guidelines for their customer-loyalty programs: gs. * Let customers know upfront how the information will be used. Most stores include a privacy statement on their application, while some post it at the customer service desk or other areas of the store. * Do not share customer data directly with manufacturers. Send it only to mailing houses. If there is still concern about sending it to a mailing house, there are methods of "masking," where codes ...

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