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

# Refund Conversion

> Apply a full or partial refund to an existing server-side conversion

<Info>
  Use this endpoint after a conversion has already been recorded in Affonso and
  you need to reflect a refund or chargeback.
</Info>

## Path Parameters

<ParamField path="id" type="string" required>
  The unique identifier of the conversion/transaction to refund.
</ParamField>

## Body Parameters

All body parameters are optional. If you omit `amount`, Affonso applies a full
refund for the remaining sale balance on the conversion.

<ParamField body="amount" type="number">
  Refund amount to apply. Must be greater than zero and cannot exceed the
  remaining sale amount on the conversion.
</ParamField>

<ParamField body="currency" type="string">
  Optional three-letter currency code for your refund record, such as `USD` or
  `EUR`.
</ParamField>

<ParamField body="reason" type="string">
  Optional free-form reason, such as `customer_cancellation` or `chargeback`.
</ParamField>

<ParamField body="external_event_id" type="string">
  Optional idempotency key for the refund event. Reuse the same value when
  retrying the same upstream refund.
</ParamField>

<ParamField body="refunded_at" type="string">
  Optional ISO 8601 timestamp describing when the refund happened upstream.
</ParamField>

## Refund Behavior

* Omitting `amount` creates a full refund for the remaining balance.
* Partial refunds set `sales_status` to `partial_refunded`.
* Full refunds set `sales_status` to `refunded`.
* If an affiliate earning exists, its commission amount is reduced proportionally.
* A full refund marks the commission status as `refunded`.

## Response

The response returns the updated conversion object.

<ResponseField name="success" type="boolean">
  Always `true` for successful responses.
</ResponseField>

<ResponseField name="data" type="object">
  Updated conversion object.

  <Expandable title="Data Object Properties">
    <ResponseField name="id" type="string">
      Unique identifier for the transaction.
    </ResponseField>

    <ResponseField name="referral_id" type="string">
      Referral credited by the original conversion.
    </ResponseField>

    <ResponseField name="affiliate_id" type="string | null">
      Affiliate who received credit for the conversion.
    </ResponseField>

    <ResponseField name="program_id" type="string | null">
      Affiliate program ID for the conversion.
    </ResponseField>

    <ResponseField name="sale_amount" type="number">
      Remaining sale amount after the refund is applied.
    </ResponseField>

    <ResponseField name="sale_amount_currency" type="string">
      Stored sale currency for the conversion.
    </ResponseField>

    <ResponseField name="commission_amount" type="number">
      Remaining commission amount after the refund adjustment.
    </ResponseField>

    <ResponseField name="commission_currency" type="string | null">
      Currency or incentive unit for the commission.
    </ResponseField>

    <ResponseField name="status" type="string">
      Commission status after the refund, such as `pending` or `refunded`.
    </ResponseField>

    <ResponseField name="sales_status" type="string">
      Updated sale status: `partial_refunded` or `refunded`.
    </ResponseField>

    <ResponseField name="external_event_id" type="string | null">
      Original conversion idempotency key.
    </ResponseField>

    <ResponseField name="calculation_mode" type="string">
      Always `auto` for conversion-based flows.
    </ResponseField>

    <ResponseField name="matched_incentive_id" type="string | null">
      Returns `null` for refund responses.
    </ResponseField>

    <ResponseField name="created_at" type="string">
      ISO 8601 timestamp for when the conversion was originally created.
    </ResponseField>

    <ResponseField name="updated_at" type="string">
      ISO 8601 timestamp for the latest refund-related update.
    </ResponseField>
  </Expandable>
</ResponseField>

## Example Request

<RequestExample>
  ```bash cURL theme={null}
  curl -X POST "https://api.affonso.io/v1/conversions/com_abc123/refund" \
    -H "Authorization: Bearer sk_live_your_api_key" \
    -H "Content-Type: application/json" \
    -d '{
      "amount": 49.50,
      "currency": "USD",
      "reason": "customer_cancellation",
      "external_event_id": "refund_evt_123"
    }'
  ```
</RequestExample>

## Example Response

<ResponseExample>
  ```json Response theme={null}
  {
    "success": true,
    "data": {
      "id": "com_abc123",
      "referral_id": "ref_456def",
      "affiliate_id": "aff_789ghi",
      "program_id": "prog_123xyz",
      "sale_amount": 49.5,
      "sale_amount_currency": "USD",
      "commission_amount": 14.85,
      "commission_currency": "USD",
      "status": "ready_for_payment",
      "sales_status": "partial_refunded",
      "hold_period_days": null,
      "payment_intent_id": null,
      "invoice_id": null,
      "earning_id": "earn_123abc",
      "earning_type": "direct_commission",
      "external_event_id": "inv_2026_000145",
      "calculation_mode": "auto",
      "matched_incentive_id": null,
      "created_at": "2026-06-22T12:00:00.000Z",
      "updated_at": "2026-06-22T16:10:00.000Z"
    }
  }
  ```
</ResponseExample>

<Info>
  Full refunds emit `transaction.rejected`. Partial refunds emit
  `transaction.updated`.
</Info>