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If you cancel or return your order and had used points toward that purchase, Amazon will refund the corresponding dollar amount of the order to the American Express® Card you used. Please allow 2 to 4 business days for the refund to post to your online statement. If you would like to have the Membership Rewards® points returned to your account instead, please contact Membership Rewards program Customer Care at 1-800-297-3276 or use AmexChat.