Costco Card Membership Phone Number

Costco Card Membership Phone Number. With the new costco anywhere visa® cards by citi, exclusive to costco members, earn cash back rewards for personal or business purchases. You’re always welcome to renew your membership in person—simply do so while you’re checking out at a costco location, it’s that simple!

You can find your costco membership number in the following places: Estimated 2% reward (if you’re an executive member) you can use the edit feature to update your information, as well as remove and add cardholders (as allowed.