A chargeback was opened or processed. These two fields are the entire body — there is no id, amount or reason. If the card dispute is won, the payment returns to the status it had before the chargeback and PAYMENT_PAID or PAYMENT_CONFIRMED is sent again for that status; a payment restored to REFUNDED or PARTIAL_REFUND sends no webhook.

The HTTP body is this object exactly — there is no envelope and no type field. The event name is delivered in the X-Webhook-Event header. Most optional fields arrive as an explicit null; a few keys are dropped from the JSON entirely when unset, and those are marked as such below. Read values with a null-safe accessor rather than testing key presence.