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Do not execute a refund while another is in progress. Wait for the current operation to complete before starting a new one.

This service allows you to cancel or refund an existing payment. Our system will identify if a cancellation or a refund is necessary based on the payment, no transaction_id is needed in this case. This service performs the following functions based on the status of the transaction:

Cancels the payment if it has not been captured.
Refunds the payment if it has been captured.

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Refunds
If you fill out the amount field, the refund will be partial. Otherwise, it will create a complete refund. The funds will be refunded to the payment method that was originally charged.

Note that this request requires an X-Idempotency-Key. Check the Authentication page for more information.