# Update Invoice

Use the Update Invoice endpoint to bulk-invoice multiple orders at once. This marks the order as invoiced in Fynd OMS and allows partners to provide additional details like acknowledgment numbers, QR codes, and IRN numbers (if applicable).

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


Try out Fynd Konnect's Update Invoice Endpoint
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**Common Request Header**

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


Important Considerations
- Supports invoice update of upto 20 orders in one call.
- Transitions orders to `bag_invoiced` after successful invoicing.
- Recommended to poll order statuses using [Fetch Orders](/konnect/channels/erp-wms/api-documentation/orders/get-orders) with `orderStatus=PROCESSING` to confirm that bag items are in a confirmed state before invoicing.


### Body

### Success Response

### API Call Example

## Error Codes

| **Reason** | **Code** | **Description** |
|  --- | --- | --- |
| Canceled by customer/seller | IN401 | If either the `orderId` or `orderItemId` is already canceled. |
| Invalid orderId/orderItemId | IN400 | If the `orderId` is not found in the authorized location or `orderItemId` doesn't exist for that order. |
| Invalid invoiceId/invoiceType | IN422 | If the invoice identifiers or `invoiceType` do not align with Fynd's invoicing rules. |
| Order is already invoiced | IN453 | A duplicate invoice request was raised when the shipment is already at or beyond the invoiced state. |
| Invalid request | IN403 | Invoicing was attempted too early (before the order was confirmed). |


Next Steps
* For self-ship orders (where auto-invoicing is enabled on Fynd Commerce), to provide Fynd with the Air Waybill number for the order, see [Update AWB](/konnect/channels/erp-wms/api-documentation/orders/put-update-awb)
* To pass a pack call to Fynd for channel shipping orders (where auto-invoicing and auto courier assignment are enabled on Fynd Commerce), head over to [Order Pack](/konnect/channels/erp-wms/api-documentation/orders/post-order-pack)