Most payment systems have a process currency. If you leave this blank, Kartris will pass orders to the payment system in whatever currency the user selects on your site. For that to work, your payment system provider must support multiple currencies, and your account with them must permit orders in all the currencies available on your site.

You should set the process currency from blank, if:

• Your payment system account only supports one currency
• Your store offers customers a choice of at least one currency that your payment system account does not support
• Your payment system provider provides very poor currency conversion rates, so you prefer to pass all orders in a single currency as customers will get better conversion rates from their credit card providers.

The process currency (if not blank) should be a three-letter ISO code for the appropriate currency.

Customers will be alerted at the last step of the checkout that the actual amount they will pay will be converted, and they will be shown the converted amount in that currency, as well as the order total in their preferred currency. This conversion will be done at the rate in your currency settings.