curl -X POST "https://sandbox.cucu.bo/api/v1/invoices/a1b2c3d4-e5f6-7890-abcd-ef1234567890/credit-note" \
  -H "Content-Type: application/json" \
  -H "X-API-Key: YOUR_API_KEY" \
  -d '{
    "pointOfSaleId": "660e8400-e29b-41d4-a716-446655440004",
    "notaType": "CREDITO",
    "paymentMethodCode": 1,
    "returnedDetails": [
      {
        "activityEconomic": "620100",
        "codeProductSin": "83141",
        "description": "Devolucion parcial - Servicio de software",
        "quantity": 1,
        "unitMeasure": 58,
        "priceUnit": 200.00
      }
    ]
  }'

const response = await fetch(
  'https://sandbox.cucu.bo/api/v1/invoices/a1b2c3d4-e5f6-7890-abcd-ef1234567890/credit-note',
  {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-API-Key': 'YOUR_API_KEY'
    },
    body: JSON.stringify({
      pointOfSaleId: '660e8400-e29b-41d4-a716-446655440004',
      notaType: 'CREDITO',
      paymentMethodCode: 1,
      returnedDetails: [{
        activityEconomic: '620100',
        codeProductSin: '83141',
        description: 'Devolucion parcial - Servicio de software',
        quantity: 1,
        unitMeasure: 58,
        priceUnit: 200.00
      }]
    })
  }
);
const data = await response.json();

import requests

response = requests.post(
    'https://sandbox.cucu.bo/api/v1/invoices/a1b2c3d4-e5f6-7890-abcd-ef1234567890/credit-note',
    headers={
        'Content-Type': 'application/json',
        'X-API-Key': 'YOUR_API_KEY'
    },
    json={
        'pointOfSaleId': '660e8400-e29b-41d4-a716-446655440004',
        'notaType': 'CREDITO',
        'paymentMethodCode': 1,
        'returnedDetails': [{
            'activityEconomic': '620100',
            'codeProductSin': '83141',
            'description': 'Devolucion parcial - Servicio de software',
            'quantity': 1,
            'unitMeasure': 58,
            'priceUnit': 200.00
        }]
    }
)
print(response.json())

{
  "success": true,
  "message": "Nota creada exitosamente",
  "data": {
    "id": "b2c3d4e5-f6a7-8901-bcde-f12345678901",
    "invoiceNumber": 10,
    "cuf": "3983G8305613443F748GCBGCD4765FB93313BE59F1A7AF25FCFC9BG85",
    "state": "VALIDATED",
    "clientBusinessName": "EMPRESA DEMO S.R.L.",
    "amountTotal": 200.00,
    "emissionDate": "2026-02-22T10:30:00",
    "pdfUrl": "https://sandbox.cucu.bo/api/v1/public/invoice/3983G...G85/pdf",
    "xmlUrl": "https://sandbox.cucu.bo/api/v1/public/invoice/3983G...G85/xml"
  },
  "timestamp": "2026-02-22T10:30:00"
}

{
  "success": false,
  "error": {
    "code": "BAD_REQUEST",
    "details": "La factura original no tiene detalles suficientes para la devolucion solicitada"
  },
  "timestamp": "2026-02-22T10:30:00"
}

{
  "success": false,
  "error": {
    "code": "CONFLICT",
    "details": "La factura original no esta en estado VALIDATED"
  },
  "timestamp": "2026-02-22T10:30:00"
}