Service fallback method and apparatus

A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:

• receiving a refund request for an international transaction;
• in response to receiving the refund request, retrieving previously-stored exchange rate information for the international transaction associated with the refund request, wherein the exchange rate information includes an exchange rate between a foreign currency and a national currency that was in effect when the international transaction was originally processed;
• calculating a refund amount for the international transaction based on the previously-stored exchange rate information;
• processing the refund request for the international transaction based on the calculated refund amount.

A computer-implemented system, comprising:

• one or more computers;
• and
• one or more computer memory devices interoperably coupled with the one or more computers and having tangible, non-transitory, machine-readable media storing one or more instructions that, when executed by the one or more computers, perform one or more operations comprising:
• receiving a refund request for an international transaction;
• in response to receiving the refund request, retrieving previously-stored exchange rate information for the international transaction associated with the refund request, wherein the exchange rate information includes an exchange rate between a foreign currency and a national currency that was in effect when the international transaction was originally processed;
• calculating a refund amount for the international transaction based on the previously-stored exchange rate information;
• processing the refund request for the international transaction based on the calculated refund amount.