You can add an Idempotency Key in the request headers (x-idempotency-key) to ensure that a particular operation is only performed once, regardless of how many times the request is made for 24 hours since the last request. It is used by the backend to identify duplicate requests, preventing the execution of the same operation multiple times. This is useful for operations such as payments or submissions to avoid duplicate processing.
This applies to both Test and Production modes.