Process a refund for a previously captured transaction. This returns money to the customer's original payment method.
mPay supports partial refunds.

About Refunds

Refund operations are used to:

• Return money to customers for captured transactions
• Handle returns, exchanges, and customer complaints
• Process partial refunds for partial returns
• Correct billing errors and overcharges

Partial Refunds: If the total transaction amount was 100 AUD and the 'refund' is initiated with the amount of 70 AUD that automatically constitutes as a partial refund of 70 AUD of the original transaction.

Refunds for Multi-Currency Transactions: Refunds for multi-currency transactions are NOT currently supported. Any transaction processed in a different currency must be refunded directly by the merchant.

Note: The request must hold a valid session token.