Costco and Sam's Club each offer their own branded credit cards that members can use to maximize their cash back. Here's how they stack up.

Citigroup mistakenly sent some active Costco Wholesale members an email telling them their memberships had lapsed and their new co-branded Costco Visa accounts had been closed. The Costco Visa card ...

Many people love Costco because of its wide variety of products (and the free sample stations you can pick from while you shop!) However, some don't like the retailer's restrictions on payment options ...

Costco named Citigroup and Visa as its new credit partners, replacing American Express as the exclusive network at its stores beginning in April of next year. WSJ's Paul Ziobro explains on MoneyBeat.

The Costco switchover from American Express to Visa is Monday, opening up the ability for millions more customers to use plastic. After only accepting American Express for the past 16 years, Costco ...