# CRUD: Create an invoice adjustment

Endpoint: POST /v1/object/invoice-adjustment
Version: 2025-12-17

## Header parameters:

  - `Idempotency-Key` (string)
    Specify a unique idempotency key if you want to perform an idempotent POST or PATCH request. Do not use this header in other request types. 

With this header specified, the Zuora server can identify subsequent retries of the same request using this value, which prevents the same operation from being performed multiple times by accident.

  - `Accept-Encoding` (string)
    Include the Accept-Encoding: gzip header to compress responses as a gzipped file. It can significantly reduce the bandwidth required for a response. 

If specified, Zuora automatically compresses responses that contain over 1000 bytes of data, and the response contains a Content-Encoding header with the compression algorithm so that your client can decompress it.

  - `Content-Encoding` (string)
    Include the Content-Encoding: gzip header to compress a request. With this header specified, you should upload a gzipped file for the request payload instead of sending the JSON payload.

  - `Authorization` (string)
    The value is in the Bearer {token} format where {token} is a valid OAuth token generated by calling Create an OAuth token.

  - `Zuora-Entity-Ids` (string)
    An entity ID. If you have Zuora Multi-entity enabled and the OAuth token is valid for more than one entity, you must use this header to specify which entity to perform the operation in. If the OAuth token is only valid for a single entity, or you do not have Zuora Multi-entity enabled, you do not need to set this header.

  - `Zuora-Track-Id` (string)
    A custom identifier for tracing the API call. If you set a value for this header, Zuora returns the same value in the response headers. This header enables you to associate your system process identifiers with Zuora API calls, to assist with troubleshooting in the event of an issue.

The value of this field must use the US-ASCII character set and must not include any of the following characters: colon (:), semicolon (;), double quote ("), and quote (').

## Query parameters:

  - `rejectUnknownFields` (boolean)
    Specifies whether the call fails if the request body contains unknown fields.
With rejectUnknownFields set to true, Zuora returns a 400 response if
the request body contains unknown fields. The body of the 400 response is:

json
{
    "message": "Error - unrecognised fields"
}


By default, Zuora ignores unknown fields in the request body.

## Request fields (application/json):

  - `AccountId` (string)
    The ID of the account that owns the invoice.
Character limit: 32 Values: inherited from Account.ID for the invoice owner

  - `AccountingCode` (string)
    The accounting code for the invoice adjustment.
    Example: "Accounts Receivable"

  - `AdjustmentDate` (string)
    The date when the invoice adjustment is applied. This date must be the same as the invoice's date or later.
Character limit: 29 Values: Leave null to automatically generate the current date
    Example: "2016-10-20"

  - `AdjustmentNumber` (string)
    A unique string to identify an individual invoice adjustment.
Character limit: 255 Values: automatically generated

  - `Amount` (number, required)
    The amount of the invoice adjustment.
Character limit: 16 Values: a valid currency amount
    Example: 1.2

  - `Comments` (string)
    Use this field to record comments about the invoice adjustment.
Character limit: 255 Values: a string of 255 characters or fewer
    Example: "this is comments"

  - `CustomerName` (string)
    The name of the account that owns the associated invoice.
Character limit: 50 Values: inherited from Account.Name

  - `CustomerNumber` (string)
    The unique account number of the customer's account.
Character limit: 70 Values: inherited from Account.AccountNumber

  - `ImpactAmount` (number)
    The amount that changes the balance of the associated invoice.
Character limit: 16 Values: automatically calculated

  - `InvoiceId` (string)
    The ID of the invoice associated with the adjustment. This field is only required if you don't specify a value for the InvoiceNumber field.
Character limit: 32 Values: a valid invoice ID
    Example: "2c93808457d787030157e030d10f3f64"

  - `InvoiceNumber` (string)
    The unique identification number for the associated invoice. This field is only required if you don't specify a value for the InvoiceId field.
Character limit: 32 Values: a valid invoice number
    Example: "INV00000001"

  - `ReasonCode` (string)
    A code identifying the reason for the transaction. Must be an existing reason code or empty. If you do not specify a value, Zuora uses the default reason code.
Character limit: 32 Values: a valid reason code

  - `ReferenceId` (string)
    A code to reference an object external to Zuora. For example, you can use this field to reference a case number in an external system.
Character limit: 100 Values: a string of 100 characters or fewer
    Example: "refid-1476935078657"

  - `Status` (string)
    The status of the invoice adjustment. This field is only required in the Query call, but is automatically generated in other calls.
Character limit: 9 Values: Canceled, Processed

  - `Type` (string, required)
    Indicates whether the adjustment credits or debits the invoice amount.
Character limit: 6 Values: Credit, Charge
    Example: "Credit"

## Response 200 fields (application/json):

  - `Id` (string)
    Example: "2c93808457d787030157e030232f3748"

  - `Success` (boolean)
    Example: true

## Response 400 fields (application/json):

  - `Errors` (array)

  - `Errors.Code` (string)

  - `Errors.Message` (string)

  - `Success` (boolean)

## Response 401 fields (application/json):

  - `message` (string)
    Error message.

If the error message is "Authentication error", ensure that the Authorization request header contains valid authentication credentials, then retry the request. See [Authentication](https://developer.zuora.com/rest-api/general-concepts/authentication/) for more information.

If the error message is "Failed to get user info", retry the request.