If you use your Amon card to make a foreign transaction with currency different from EUR or GBP, please note that for such transactions, the interbank conversion scale applies. This rate may change accordingly to the daily rate of the pair.
A foreign transaction is any transaction made in a currency different from EUR or GBP. Your default currency will be the national currency of the country of issuance.
Your card has default currency GBP and you are making a payment in USD. Your default currency GBP will be converted to USD. In case you have no GBP, your EUR account will be converted to USD.