{
  "invoice_date": "2026-06-27",
  "due_date": "2026-07-11",
  "currency": "EUR",
  "seller": {
    "name": "Fakturai Demo GmbH",
    "address": {
      "line_one": "Beispielstrasse 12",
      "postcode": "10115",
      "city": "Berlin",
      "country": "DE"
    },
    "vat_id": "DE123456789",
    "email": "billing@example.invalid"
  },
  "buyer": {
    "name": "Acme GmbH",
    "address": {
      "line_one": "Industrieweg 4",
      "postcode": "80331",
      "city": "Muenchen",
      "country": "DE"
    },
    "vat_id": "DE987654321",
    "email": "ap@example.invalid"
  },
  "lines": [
    {
      "name": "API-generated ZUGFeRD invoice test",
      "quantity": "1",
      "unit": "C62",
      "unit_price": "249.00",
      "vat_rate": "19.00"
    }
  ],
  "payment_terms": "Due within 14 days",
  "delivery_date": "2026-06-27"
}