The card has inbuilt intelligence to process the transaction if there is sufficient fund in any of the available currencies to authorize the transaction. If there is no sufficient balance in the transaction currency, the payment is processed by debiting the currency with sufficient balance. Please note that if there is no sufficient balance in any currency then the transaction will be declined even if collectively, across the currencies, the card has sufficient balance. Please note that cross currency conversion charges will be applicable in cases where the transaction is processed by utilizing funds from different currency.