As an Issuer, how do I use the calculated currency conversion rates?
Issuers may either download the calculated cross-rates and make them directly available to their cardholders or provide a cross-link to the MasterCard public website. Issuers are not permitted to display or present any rates as the MasterCard reference rates, other than the rates published on MasterCard’s website or as derived from the T057 Conversion Rate File. The Currency Conversion Tool is a MasterCard service to which the obligation to comply with the Standards applies. For more information, please see MasterCard Rules, Chapter 3, Maestro Global Rules, Chapter 3 and Cirrus Worldwide Operating Rules, Chapter 3.