Cancel a payment

An authorised payment can be either captured (where funds are sent to a merchant's account) or cancelled (where a merchant decides to reject the payment for some reason like a high risk of fraud).

Note that cancelling a payment is not possible for transactions that have already been captured. In this case the merchant should initiate a refund to send funds back to a shopper. Captures, cancels, and refunds together are called modifications, since they modify the state of an authorised payment request.