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

# Partner cancellation

> Cancel a delivered transaction with a required reason.

# Partner cancellation

```http theme={null}
POST /api/webhooks/partner-cancellation
```

## Auth

Buyer webhook secret.

## Body

```json theme={null}
{
  "transactionId": "txn_...",
  "reason": "Lead outside service area"
}
```

`reason` is **required**.

## Notes

Cancellation may be rejected if outside the allowed cancellation window (`PartnerCancellationWindowError`). Responses may use the structured partner webhook helper (`accepted` / `code` / `message`) on validation failures.