Allows you to submit a spendback in the body of an API request.
A spendback request can only be made for an existing recipient and you can only process one spendback at a time.
Each spendback request must include the amount and currency parameters as well as one of the following recipient parameters (if you specify more than one, they are prioritized in the given order): - recipientId - recipientRef - email
To use the Try It feature for this endpoint, you must use the credentials for your Sandbox API user.
Include at least the amount and currency parameters, along with one of the recipient parameters (see above).