
Costco customers will have to use a new credit card next year. The wholesaler failed to come to a new agreement with American Express. Costco shoppers will be able to use AmEx at its stores until December 31st – after that AmEx cards will no longer be accepted. With 88 stores across Canada, Costco is one of the country’s largest retailers. The negotiation breakdown comes as a blow to AmEx, who just recently launched two cash-back credit cards.




