After receiving a Checkout event, Signifyd’s PreAuth integration requires a follow-up call to the Transaction endpoint. Your PreAuth integration must send this request after your system has received the payment authorization response from your payment gateway.
Note: Any Checkout events that do not have a corresponding Transaction call will be considered approved by default. This may impact billing for merchants, particularly those using Signifyd’s Guaranteed Fraud Protection model, as Signifyd generally does not charge for PreAuth orders that fail bank authorization.
Once you have received the response from your payment gateway, initiate the Transaction call to submit complete transaction details. The transactions array provided in this call will replace any existing transactions array in the associated order (matched by orderId). Ensure that this call includes both the data elements from the initial Checkout event and any additional details obtained after authorization. This step finalizes the transaction, unless further events, such as voids or refunds, occur.