Cardmember Service is the credit card servicing and billing name used by U.S. Bank, one of the largest banks in the United States, for its consumer and business Visa, Mastercard, and American Express credit card accounts. It handles billing, payments, balance transfers, rewards, and customer support for U.S. Bank-issued cards.

Use Fluz to maximize rewards on your Cardmember Service (U.S. Bank) credit card payments. Instead of paying your balance directly, buy a Fluz gift card for the amount due and use it to make your payment, earning cashback on money you already owe. Fluz stacks with other rewards programs, so you can layer this cashback on top of your U.S. Bank card rewards. It's a simple way to squeeze extra savings out of a payment you're making anyway, with cashback credited straight to your Fluz wallet.