Starting Monday, June 20, 2016, Costco will no longer be accepting American Express credit cards.
According to their website, http://www.costco.com/, they will accept all Visa cards, cash, checks, debit/ATM cards, EBT and Costco Cash Cards at their warehouses (this is what they call their stores.)
If you shop online at Costco.com, you can use all Visa cards, MasterCard, Discover, debit/ATM cards and Costco Cash Cards.
Submitted by Tidelines Editors