> ## Documentation Index
> Fetch the complete documentation index at: https://docs.gr4vy.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Anti-fraud reviews

> Manually reviewing anti-fraud decisions

Some anti-fraud services may hold a transaction in review. If your chosen anti-fraud service supports this feature then you
can enable manual reviews as part of the payment flow. This pauses a transaction and waits for the result of the
review before proceeding.

<Frame caption="A transaction in review">
  <img src="https://mintcdn.com/gr4vy/jCFeFdffXM43huI0/assets/images/anti-fraud/in-review.png?fit=max&auto=format&n=jCFeFdffXM43huI0&q=85&s=e50599d1e2487eb8d887fe780aac9ea2" alt="A transaction in review" width="1110" height="741" data-path="assets/images/anti-fraud/in-review.png" />
</Frame>

When a transaction is marked for review the following steps are performed.

* The transaction request is accepted
* A call is made out to the anti-fraud service to fetch a decision
* When the service requires a manual review, the transaction is marked as pending review
* The transaction is authorized but does not continue to capture
* When a support agent reviews the transaction a webhook is received
* The pending review status is removed from the transaction
* Either capture proceeds if that was the original intent, or the transaction is voided if it was rejected

## Supported connections

The following anti-fraud services currently support manual reviews.

* Cybersource Decision Manager
* Sardine
* Sift

## Set up webhooks

To enable manual review you need to set up webhooks from your anti-fraud service to the system. This webhook is used
to notify when a review has had a decision.

To get the webhook URL, head over to your connection by going to **Connections** -> **\[Anti-Fraud connection]** -> **Synchronization** and copying the webhook URL.

Then follow the guide for your chosen anti-fraud service to set up the webhook in their dashboard.