Revindex currently does not accept AMEX (American Express) on our site because AMEX is in a contract dispute with PayPal Canada, our payment processor for credit cards. Until they reach an agreement, PayPal Canada is only allowed to process AMEX card on their own site.
You can still pay by AMEX by completing your checkout as a purchase order.
Once we received your order, we'll email you back with an invoice to pay. Simply click on the Pay Invoice button and you'll be redirected to PayPal site. From there, you can choose the option Don't have a PayPal account and safely pay by AMEX credit card.