. Merchants are assigned codes based on what they primarily sell. We group certain merchant codes into categories that are eligible for additional points. A purchase with a merchant will not earn additional points if the merchant's code is not included in an additional points category. You may not receive additional points if we receive inaccurate information or are otherwise unable to identify your purchase as eligible for an additional points category. For example, you may not receive additional points when: a merchant uses a third-party to sell their products or services; or a merchant uses a third-party to process or submit your transaction to us (e.g., using mobile or wireless card readers); or you choose to make a purchase using a third-party payment account or make a purchase using a mobile or digital wallet. Please visit americanexpress.com/rewards-info for more information about rewards. 