# Add order-line-items of order processed by Ratepay

You can add a debit or credit to the processed order by Ratepay. It is required that at least one order-item has been marked as shipped and not returned.

Endpoint: POST /ratepay/order-management/addItem/{orderId}
Version: for the Ratepay SW6 module v6.x and below
Security: oAuth

## Path parameters:

  - `orderId` (string, required)
    Identifier of the order

## Request fields (application/json):

  - `grossAmount` (number, required)
    Gross amount of debit/credit. Have to be negative for credits.
    Example: -5

  - `name` (string, required)
    Description of the order-line-item.
    Example: "Discount for damaged goods"

  - `taxId` (string, required)
    Tax-id to apply
    Example: "a06c753d068c487991d6a833b4133560"

## Response 500 fields (application/json):

  - `status` (boolean)

  - `message` (string)
    Details about the error


## Response 204 fields

## Response 400 fields

## Response 404 fields