# Send UBL 2.1 invoice

Accepts a UBL 2.1 XML document as raw binary stream and processes it.

Endpoint: POST /rest/v1/documents/send
Version: v1.0.0
Security: 

## Header parameters:

  - `companyVatNumber` (string, required)
    VAT number of the company.
    Example: "HR12345678910"

  - `fiscalization` (boolean)
    Fiscalization flag.

  - `x-fileName` (string)
    Optional file name override for uploaded XML document.

  - `x-software-id` (string)
    External software identifier to track the originating system.

## Response 200 fields (application/json):

  - `documentId` (string, required)


## Response 401 fields

## Response 500 fields