Upload Attachment (media/upload)

IMPACT DEMO API

https://einvoiceapiuat.impact.gr

POST

/media/upload/{issuerTIN}/{InternalDocumentId}

Upload Invoice Attachment

Attaches an arbitrary supporting file to an already-submitted invoice, such as a delivery note, contract, or image.

Attachments are stored per invoice and retrieved separately from the invoice document.

Allowed File Types

Maximum file size: 10 MB

Category	Allowed Extensions
Images	`.jpg`, `.jpeg`, `.png`, `.heic`
PDF	`.pdf`
Office / Data	`.doc`, `.docx`, `.xls`, `.xlsx`, `.csv`

Any other file extension will be rejected.

Notes

The attachment can be uploaded only after the invoice has been submitted. The InternalDocumentId must already exist.

The attachment is not visible via the public link.

The attachment is accessible only to users who are included in the invoice's email recipients.

To view the attachment, the email must belong to one of the invoice recipients, such as accountingDepartmentEmails.

One file per request. To upload multiple files, make a separate request for each file.

Request

Path Params

Query Params

Header Params

Body Params multipart/form-dataRequired

Request Code Samples

Shell

JavaScript

Java

Swift

PHP

Python

HTTP

Objective-C

Ruby

OCaml

Dart

curl --location 'https://einvoiceapiuat.impact.gr/media/upload/EL123456789/260913475275314?storeDurationMonths=3' \
--header 'APIKey: <your api key>' \
--form 'File=@""'

Responses

🟢200Success

application/json

Bodyapplication/json

Example

[
    {
        "filename": "sample.csv",
        "success": true
    }
]

Modified at 2026-09-21 14:00:47

Invoice Document PDF Upload (Invoice/File)

Elise - WDC Translator