Webhook Events & Event Types

Core Event Types

To see the events payload, please visit our API reference

Our webhook system currently supports the following core event types:

Chargeback events

1. chargeback.created

Triggered when a new chargeback is received for the merchant.

This event fires immediately when a new chargeback is received from any of your connected PSPs (Payment Service Providers). The payload includes all available chargeback data at the time of creation.

2. chargeback.updated

Triggered when a chargeback is updated.

3. chargeback.status.updated

Triggered when a chargeback status update is received.

4. chargeback.evidence.submitted

Triggered when evidence is successfully submitted to the PSP.

The payload carries the outcome in status which can be succeeded | failed.

5. chargeback.accepted

Triggered when a chargeback acceptance is successfully confirmed by the PSP.

The payload carries the outcome in status which can be succeeded | failed.

Alert events

6. pre_chargeback_alert.received

Triggered when a new pre chargeback alert is received from either CDRN, RDR or Ethoca.

7. pre_chargeback_alert.refund.succeeded

Triggered when the linked transaction to a refunded alert was successfully refunded through the PSP.

8. pre_chargeback_alert.refund.failed

Triggered when a refund alert is failed to be processed.

9. pre_chargeback_alert.transaction_matched

Triggered when an inbound pre-chargeback alert was successfully matched to an underlying transaction.

Opt-in only, gated by an additional event types account configuration done by Justt.

Subscription-related events

10. subscription.cancel_immediately.success

Triggered when a CRM subscription was successfully cancelled after a refund (e.g. Chargebee or Recurly).

11. subscription.cancel_immediately.failed

Triggered when cancelling a CRM subscription failed after a refund (e.g. subscription not found or already cancelled).

The payload carries failureCode and a human-readable failureReason. The refund went through but the cancellation did not, so Justt flags the alert as Action Required for manual follow-up.

Event Filtering

When configuring your webhook endpoint, you can:

• Subscribe to all events - Receive all event types (default behavior)
• Subscribe to specific events - Choose only the events you need to reduce noise

We recommend starting with all events for testing, then filtering to specific event types for production use.