# Credit Note

The Credit Note API is used to post a credit note for a seller-accepted return or an RTO, marking it as "invoiced."

> **Request Type**: `POST`
**Scheme**: `HTTPS`
**Endpoint**: `https://{{host}}/oms/v3/shipment/invoiceUpdate`


Try out Fynd Konnect's Credit Note Endpoint
br
**Common Request Header**

| Header | Mandatory | Description |
|  --- | --- | --- |
| `x-access-token` | Yes | The token required for authenticated calls to Fynd Konnect. |


### Body

### Success Response

### API Call Example

Important Considerations
- Supports invoice updates for up to 20 orders in one call.
- Transitions orders to `credit_note_generated` on Fynd OMS after successful reverse-invoicing.
- A credit note can only be pushed against a return if it is in either the `return_bag_accepted` or `rto_bag_accepted` state on Fynd. To fetch returns in this state, use [Fetch Returns](/konnect/channels/erp-wms/api-documentation/returns/get-returns) with `orderStatus=RETURN_COMPLETED`.