# Chargebacks and refunds

To refund all or part of a completed collection, raise a chargeback:

```bash
curl -X POST https://api.intasend.com/api/v1/chargebacks/ \
  -H "Authorization: Bearer $INTASEND_SECRET_KEY" -H "Content-Type: application/json" \
  -d '{"invoice_id": "ABC123", "amount": 100, "reason": "Duplicate payment"}'
```

| Field | Description |
|---|---|
| `invoice_id` | A `COMPLETE` invoice on your account |
| `amount` | Up to the invoice value |
| `reason` | `Unavailable service`, `Delayed delivery`, `Wrong service`, `Duplicate payment` or `Other` |

The payment's transaction becomes `CHARGEBACK-PENDING` until the chargeback is resolved. KES M-Pesa refunds are processed automatically.

| `status` | Meaning |
|---|---|
| `PENDING` | Raised |
| `PROCESSING` | Refund in progress |
| `COMPLETED` | Refunded. The transaction is `REFUNDED` |
| `DISPUTED` / `OVERDUE` | Under review |
| `CANCELLED` | Withdrawn. The funds are released back |

Updates are sent as the `reversal_event` [webhook](https://developers.intasend.com/guides/webhooks/).