If you make a large purchase online with this service. Be careful. They put a hold for the Full amount. Then, a couple days later they charge the Full amount... So, if you are on a budget. And... You are making a $650 purchase online. Expect to be temporarily out $1300... Until they fix everything your bank gives back the money CostCo placed a hold on. And, expect them to say it's no big deal. Because, everyone has that kind of money to spare...