From preferred rental agreement....
C. If you use a credit or charge card that is issued by a financial institution outside of the United States and your charges are billed to us in a currency other than U.S. Dollars, the full amount of your charge will be converted to the card account’s billing currency unless you submit a written request in advance to have the currency conversion performed by your card issuer. The conversion will be based on a conversion rate published by Reuters and will incorporate a processing charge no higher than 3% applied to all amounts relating to the transaction. This charge will replace the currency conversion processing charge applied by your card issuer. You understand that your card issuer has a currency conversion process; that you have chosen not to use your card issuer’s currency conversion process; and that you will have no recourse against your card issuer with respect to any matter related to the currency conversion or disclosure thereof.