Citi visa Costco card can be used in all 50 states just like a regular cr. card. If you don't have that citi cc on the Costco card, it would be used only at Costco.
Citi Costco Card can be used anywhere and earn Cash back Rewards
Sorry no just gas and local stores
Their membership card can only be used at costco and their gas station, but pretty sure their credit card can be used to earn points or rewards however they do it there.
The Costco credit card can. I believe it is issued by citibank.
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