Originally Posted by
pokee
Visa is exclusive to Costco in the US, however, from what I've read online, Capital One Costco MasterCard will work in the US, because it's tied to your membership in Canada. This is not mentioned anywhere on their website, and I would suspect not many staff would know about it. But Costco MC users from Canada claim it works at the the Costcos in the US they've tried...
I would expect that the Capital One Costco MC would work just as a membership card in the US, but I would be interested to know if it also works as a payment card.