Costco no longer accepts American Express; they now accept all forms of Visa cards as payment

Costco made the big switcheroo today, 6/20/16.  As of today, American Express is no longer accepted at Costco Warehouses, and Visa is, including the Costco Visa CitiCard which is the substitute credit card for the Costco AmEx card.  If you had a Costco AmEx card, you should have already received your new Costco Visa CitiCard.

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