Contazen API Documentation

Overview

e-Factura is Romania’s electronic invoicing system managed by ANAF (National Agency for Fiscal Administration). All invoices (both B2B and B2C) must be reported to the SPV (Spațiul Privat Virtual) platform. Contazen provides seamless integration with the e-Factura system, handling the OAuth2 authentication, XML generation, and submission processes automatically.

Prerequisites

Before using e-Factura features through the API, ensure your account is properly configured:

ANAF OAuth2 Setup: Complete the OAuth2 authorization flow in your Contazen dashboard
Environment Selection: Choose between test (sandbox) or live (production) mode
Proper Firm Registration: Ensure your firm details (CUI, address, etc.) are accurate

Setup Process

1. Check e-Factura Status

First, verify your e-Factura configuration using the Settings endpoint:

curl -X GET "https://api.contazen.ro/v1/settings" \
  -H "Authorization: Bearer your_api_key_here"

const response = await fetch('https://api.contazen.ro/v1/settings', {
  headers: {
    'Authorization': 'Bearer your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const settings = await response.json();
console.log('e-Factura Status:', settings.data.efactura);

import requests

response = requests.get(
    'https://api.contazen.ro/v1/settings',
    headers={'Authorization': 'Bearer your_api_key_here'}
)

settings = response.json()
print('e-Factura Status:', settings['data']['efactura'])

$ch = curl_init('https://api.contazen.ro/v1/settings');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, [
    'Authorization: Bearer your_api_key_here'
]);

$response = curl_exec($ch);
$settings = json_decode($response, true);
echo 'e-Factura Status: ' . json_encode($settings['data']['efactura']);

2. e-Factura Settings Response

The settings response includes comprehensive e-Factura status information:

{
  "success": true,
  "data": {
    "efactura": {
      "enabled": true,
      "oauth_configured": true,
      "test_mode_available": true,
      "live_mode_available": true,
      "oauth_created_at": "2024-01-15T10:30:00Z",
      "oauth_expires_at": "2024-07-15T10:30:00Z",
      "settings": {
        "environment": "test",
        "auto_send": false,
        "auto_send_timing": "immediately",
        "send_to_public_institutions": true
      }
    }
  }
}

3. Manual OAuth Setup

If oauth_configured is false, you’ll need to complete the OAuth setup in the Contazen dashboard before using the API endpoints.

Creating e-Factura Compatible Invoices

Invoice Requirements

For invoices to be eligible for e-Factura submission:

Document Type: Must be fiscal
Client Type: B2B with valid Romanian CUI or B2C (CNP is optional, use - if not available)
Complete Data: All required fields must be present
Status: Invoice must be finalized (not draft)
UBL Compliance: Items should include proper UBL unit codes

UBL Unit Codes for e-Factura

The Romanian e-Factura system requires UBL (Universal Business Language) unit codes for proper classification. Contazen automatically handles this with intelligent defaults and mappings.

Default Behavior

Default Unit: If no ubl_um is specified, defaults to H87 (bucată/piece)
Auto-mapping: System maps common Romanian units to UBL codes automatically
Validation: Invalid codes generate warnings but don’t block invoice creation
e-Factura Status: efactura_enabled defaults to true for fiscal invoices

Common UBL Unit Codes

UBL codes are case-insensitive. Both H87 and h87 work correctly.

Code	Description	Romanian	Best Used For
H87	Piece/Item	bucată	Physical products, default
HUR	Hour	oră	Time-based services
DAY	Day	zi	Daily rates, rentals
MON	Month	lună	Monthly subscriptions
ANN	Year	an	Annual licenses
KGM	Kilogram	kilogram	Weight-based products
MTR	Meter	metru	Length measurements
LTR	Liter	litru	Liquids, chemicals
KMT	Kilometer	kilometru	Transport, delivery

Example Invoice Creation

Basic Invoice with UBL Units

// B2B Invoice Example
const b2bInvoiceData = {
  client_data: {
    type: "b2b",
    name: "Example SRL",
    cui: "RO12345678",
    address: "Str. Exemplu Nr. 1",
    city: "București",
    county: "București",
    email: "contact@example.com"
  },
  items: [
    {
      description: "Servicii consultanță IT",
      quantity: 10,
      price: 150.00,
      vat_rate: 19,
      unit: "ore",
      ubl_um: "HUR"  // UBL code for hours
    }
  ],
  document_type: "fiscal",
  efactura_enabled: true,
  observations: "Factură pentru servicii IT"
};

const response = await fetch('https://api.contazen.ro/v1/invoices', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your_api_key_here',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify(b2bInvoiceData)
});

const invoice = await response.json();
console.log('Invoice created:', invoice.data.id);

// B2C Invoice Example
const b2cInvoiceData = {
  client_data: {
    type: "b2c",
    name: "Ion Popescu",
    cnp: "1234567890123", // Optional - use "-" if not available
    address: "Str. Exemplu Nr. 1",
    city: "București",
    county: "București",
    email: "ion.popescu@example.com"
  },
  items: [
    {
      description: "Produs electronic",
      quantity: 1,
      price: 500.00,
      vat_rate: 19,
      unit: "buc",
      ubl_um: "H87"
    }
  ],
  document_type: "fiscal",
  efactura_enabled: true
};

import requests

# B2B Invoice Example
b2b_invoice_data = {
    "client_data": {
        "type": "b2b",
        "name": "Example SRL",
        "cui": "RO12345678",
        "address": "Str. Exemplu Nr. 1",
        "city": "București",
        "county": "București",
        "email": "contact@example.com"
    },
    "items": [
        {
            "description": "Servicii consultanță IT",
            "quantity": 10,
            "price": 150.00,
            "vat_rate": 19,
            "unit": "ore"
        }
    ],
    "document_type": "fiscal",
    "efactura_enabled": True,
    "observations": "Factură pentru servicii IT"
}

response = requests.post(
    'https://api.contazen.ro/v1/invoices',
    headers={'Authorization': 'Bearer your_api_key_here'},
    json=b2b_invoice_data
)

invoice = response.json()
print('Invoice created:', invoice['data']['id'])

# B2C Invoice Example
b2c_invoice_data = {
    "client_data": {
        "type": "b2c",
        "name": "Ion Popescu",
        "cnp": "1234567890123",  # Optional - use "-" if not available
        "address": "Str. Exemplu Nr. 1",
        "city": "București",
        "county": "București",
        "email": "ion.popescu@example.com"
    },
    "items": [
        {
            "description": "Produs electronic",
            "quantity": 1,
            "price": 500.00,
            "vat_rate": 19,
            "unit": "buc",
            "ubl_um": "H87"
        }
    ],
    "document_type": "fiscal",
    "efactura_enabled": True
}

Advanced e-Factura Compliance

For full e-Factura compliance, include additional UBL classification codes:

const advancedInvoiceData = {
  client_data: {
    type: "b2b",
    name: "Tech Solutions SRL",
    cui: "RO98765432",
    address: "Bd. Magheru Nr. 15",
    city: "București",
    county: "București"
  },
  items: [
    {
      description: "Laptop DELL XPS 15",
      quantity: 2,
      price: 5000.00,
      vat_rate: 19,
      unit: "bucăți",
      ubl_um: "H87",              // UBL unit: piece
      ubl_nc: "84713000",         // Combined Nomenclature code
      ubl_cpv: "30213100-6",      // Common Procurement Vocabulary
      vat_key: "S"                // Standard VAT rate classification
    },
    {
      description: "Installation and setup service",
      quantity: 8,
      price: 200.00,
      vat_rate: 19,
      unit: "ore",
      ubl_um: "HUR",              // UBL unit: hour
      ubl_cpv: "72253000-3"       // CPV for computer support services
    }
  ],
  document_type: "fiscal",
  efactura_enabled: true
};

const response = await fetch('https://api.contazen.ro/v1/invoices', {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your_api_key_here',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify(advancedInvoiceData)
});

advanced_invoice_data = {
    "client_data": {
        "type": "b2b",
        "name": "Tech Solutions SRL",
        "cui": "RO98765432",
        "address": "Bd. Magheru Nr. 15",
        "city": "București",
        "county": "București"
    },
    "items": [
        {
            "description": "Laptop DELL XPS 15",
            "quantity": 2,
            "price": 5000.00,
            "vat_rate": 19,
            "unit": "bucăți",
            "ubl_um": "H87",        # UBL unit: piece
            "ubl_nc": "84713000",   # Combined Nomenclature code
            "ubl_cpv": "30213100-6", # Common Procurement Vocabulary
            "vat_key": "S"          # Standard VAT rate
        },
        {
            "description": "Installation and setup service",
            "quantity": 8,
            "price": 200.00,
            "vat_rate": 19,
            "unit": "ore",
            "ubl_um": "HUR",        # UBL unit: hour
            "ubl_cpv": "72253000-3" # CPV for computer support
        }
    ],
    "document_type": "fiscal",
    "efactura_enabled": True
}

UBL Field Reference

When creating invoice items for e-Factura, you can include these UBL-related fields:

Field	Type	Required	Description	Example
`unit`	string	No	Human-readable unit name	`"ore"`, `"bucăți"`, `"kg"`
`ubl_um`	string	No	UBL unit code for e-Factura	`"HUR"`, `"H87"`, `"KGM"`
`ubl_nc`	string	No	Combined Nomenclature code	`"84713000"`
`ubl_cpv`	string	No	Common Procurement Vocabulary	`"30213100-6"`
`vat_key`	string	No	VAT classification key	`"S"`, `"E"`, `"O"`

Auto-mapping: If you only provide unit (e.g., “ore”), Contazen automatically maps it to the correct UBL code (HUR). The system includes pre-configured mappings for common Romanian units.

UBL Validation Rules

Code Validation

UBL codes are case-insensitive (HUR, hur, Hur all work)
Invalid codes generate warnings but don’t block invoice creation
System defaults to H87 if invalid code is provided
All validation happens server-side automatically

Automatic Mapping

System checks your firm’s custom unit mappings first
Falls back to built-in mappings for common units:
- "ore" → "HUR"
- "bucăți", "buc" → "H87"
- "kg", "kilogram" → "KGM"
- "metru", "m" → "MTR"
Custom mappings can be configured in your dashboard

e-Factura Requirements

Every invoice item must have a UBL unit code for e-Factura
System ensures compliance by providing defaults
Discounts automatically use H87 (piece)
All codes are validated against UBL standards

UBL Resources and References

Official UBL Unit Codes

Complete list of UBL unit codes from PEPPOL documentation

Combined Nomenclature (CN)

EU database for product classification codes

Common Procurement Vocabulary

CPV codes for public procurement classification

ANAF e-Factura Docs

Official Romanian e-Factura documentation

Quick Start: For most use cases, you only need ubl_um. The system will handle the rest automatically. Use HUR for time-based services and H87 for physical products.

Sending Invoices to SPV

Basic SPV Submission

Once you have a fiscal invoice, submit it to the e-Factura system:

curl -X POST "https://api.contazen.ro/v1/invoices/inv_1a2b3c4d5e/send-to-spv" \
  -H "Authorization: Bearer your_api_key_here" \
  -H "Content-Type: application/json"

const response = await fetch(`https://api.contazen.ro/v1/invoices/${invoiceId}/send-to-spv`, {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your_api_key_here',
    'Content-Type': 'application/json'
  }
});

const result = await response.json();
if (result.success) {
  console.log('Submitted to SPV:', result.data.submission_id);
  console.log('Status:', result.data.status);
} else {
  console.error('Submission failed:', result.error.message);
}

response = requests.post(
    f'https://api.contazen.ro/v1/invoices/{invoice_id}/send-to-spv',
    headers={'Authorization': 'Bearer your_api_key_here'}
)

result = response.json()
if result['success']:
    print('Submitted to SPV:', result['data']['submission_id'])
    print('Status:', result['data']['status'])
else:
    print('Submission failed:', result['error']['message'])

Environment Override

You can override the default environment (test/live) for specific submissions:

curl -X POST "https://api.contazen.ro/v1/invoices/inv_1a2b3c4d5e/send-to-spv?environment=live" \
  -H "Authorization: Bearer your_api_key_here"

Successful Response

{
  "success": true,
  "data": {
    "object": "efactura_submission",
    "submission_id": "spv_abc123def456",
    "status": "submitted",
    "submitted_at": "2024-01-20T14:30:00Z",
    "environment": "test"
  }
}

Tracking Submission Status

Using Expand Parameter

Retrieve invoice details with e-Factura status:

curl -X GET "https://api.contazen.ro/v1/invoices/inv_1a2b3c4d5e?expand[]=efactura" \
  -H "Authorization: Bearer your_api_key_here"

Response with e-Factura Status

{
  "success": true,
  "data": {
    "id": "inv_1a2b3c4d5e",
    "number": "CTZ-2024-00001",
    "status": "sent",
    "efactura": {
      "object": "efactura_submission",
      "submission_id": "spv_abc123def456",
      "status": "submitted",
      "submitted_at": "2024-01-20T14:30:00Z",
      "environment": "test",
      "response_data": {
        "index_incarcare": "123456789"
      }
    }
  }
}

Voiding e-Factura Invoices

Standard Void Process

When voiding an invoice that was sent to e-Factura, the system automatically sends a cancellation message to ANAF:

curl -X POST "https://api.contazen.ro/v1/invoices/inv_1a2b3c4d5e/void" \
  -H "Authorization: Bearer your_api_key_here" \
  -H "Content-Type: application/json" \
  -d '{
    "reason": "Eroare în date client",
    "void_date": "2024-01-20"
  }'

const voidData = {
  reason: "Eroare în date client",
  void_date: "2024-01-20"
};

const response = await fetch(`https://api.contazen.ro/v1/invoices/${invoiceId}/void`, {
  method: 'POST',
  headers: {
    'Authorization': 'Bearer your_api_key_here',
    'Content-Type': 'application/json'
  },
  body: JSON.stringify(voidData)
});

const result = await response.json();
console.log('Invoice voided:', result.success);

Void Response

{
  "success": true,
  "data": {
    "id": "inv_1a2b3c4d5e",
    "status": "cancelled",
    "void_reason": "Eroare în date client",
    "void_date": "2024-01-20",
    "efactura": {
      "status": "cancelled",
      "cancellation_sent": true
    }
  }
}

Error Handling

Common e-Factura Errors

OAuth Not Configured

Error Code: efactura_oauth_not_configuredSolution: Complete OAuth setup in dashboard before using API endpoints.

Already Sent to SPV

Error Code: already_sent_to_spvSolution: Check invoice status before attempting submission.

Invalid Document Type

Error Code: invalid_document_typeSolution: Only fiscal invoices can be sent to e-Factura.

Draft Invoice

Error Code: invoice_is_draftSolution: Finalize the invoice before submitting to SPV.

Error Response Example

{
  "success": false,
  "error": {
    "message": "e-Factura OAuth not configured",
    "type": "invalid_request_error",
    "code": "efactura_oauth_not_configured",
    "status": 400
  }
}

Retry Logic for Failures

Implement retry logic for temporary failures:

async function submitToSpvWithRetry(invoiceId, maxRetries = 3) {
  for (let i = 0; i < maxRetries; i++) {
    try {
      const response = await fetch(`https://api.contazen.ro/v1/invoices/${invoiceId}/send-to-spv`, {
        method: 'POST',
        headers: {
          'Authorization': 'Bearer your_api_key_here',
          'Content-Type': 'application/json'
        }
      });
      
      const result = await response.json();
      
      if (result.success) {
        return result;
      }
      
      // Don't retry client errors
      if (response.status >= 400 && response.status < 500) {
        throw new Error(result.error.message);
      }
      
      // Retry server errors
      if (i < maxRetries - 1) {
        await sleep(Math.pow(2, i) * 1000); // Exponential backoff
      }
      
    } catch (error) {
      if (i === maxRetries - 1) throw error;
    }
  }
}

Best Practices

1. Environment Management

Development: Always start with test environment
Production: Switch to live only after thorough testing
Token Management: Monitor OAuth token expiration dates

2. Error Handling

async function createAndSubmitInvoice(invoiceData) {
  try {
    // Create invoice
    const invoice = await createInvoice(invoiceData);
    
    // Check if eligible for e-Factura
    if (invoice.data.document_type === 'fiscal') {
      
      // Submit to SPV
      const submission = await submitToSpv(invoice.data.id);
      
      return {
        invoice: invoice.data,
        efactura: submission.data
      };
    }
    
    return { invoice: invoice.data };
    
  } catch (error) {
    console.error('Invoice creation/submission failed:', error.message);
    
    // Handle specific error types
    if (error.code === 'efactura_oauth_not_configured') {
      throw new Error('Please configure e-Factura OAuth in dashboard');
    }
    
    throw error;
  }
}

3. Batch Processing

For multiple invoices, implement proper rate limiting:

async function submitMultipleInvoices(invoiceIds) {
  const results = [];
  
  for (const invoiceId of invoiceIds) {
    try {
      const result = await submitToSpv(invoiceId);
      results.push({ invoiceId, success: true, data: result.data });
      
      // Rate limiting - wait between submissions
      await sleep(1000);
      
    } catch (error) {
      results.push({ invoiceId, success: false, error: error.message });
    }
  }
  
  return results;
}

4. Status Monitoring

Regularly check submission status for long-running processes:

async function monitorSubmissionStatus(invoiceId) {
  const response = await fetch(`https://api.contazen.ro/v1/invoices/${invoiceId}?expand[]=efactura`, {
    headers: { 'Authorization': 'Bearer your_api_key_here' }
  });
  
  const invoice = await response.json();
  const efacturaStatus = invoice.data.efactura;
  
  if (efacturaStatus) {
    console.log(`Invoice ${invoiceId} - SPV Status: ${efacturaStatus.status}`);
    return efacturaStatus.status;
  }
  
  return 'not_submitted';
}

Integration Checklist

Configure OAuth

Complete the e-Factura OAuth setup in your Contazen dashboard

Test Environment

Start with test environment to validate your integration

Create Test Invoice

Create a fiscal invoice with valid Romanian client data

Submit to SPV

Test the send-to-spv endpoint with your test invoice

Handle Errors

Implement proper error handling for all scenarios

Monitor Status

Use the expand parameter to track submission status

Production Ready

Switch to live environment when ready for production

Support and Resources

Dashboard: Complete OAuth setup at app.contazen.ro
ANAF Documentation: Official e-Factura technical documentation
Support: Contact contact@contazen.ro for integration help
Status Page: Monitor API status and e-Factura system availability

Compliance Notes

Mandatory Reporting: All invoices (B2B and B2C) must be reported to SPV
Deadlines: Invoices must be submitted within legal deadlines (typically 5 days)
Data Accuracy: Ensure all client and invoice data is accurate before submission
Record Keeping: Maintain records of all e-Factura submissions for audit purposes
B2C Requirements: CNP is optional for B2C clients - use - if not available

​Overview

​Prerequisites

​Setup Process

​1. Check e-Factura Status

​2. e-Factura Settings Response

​3. Manual OAuth Setup

​Creating e-Factura Compatible Invoices

​Invoice Requirements

​UBL Unit Codes for e-Factura

​Default Behavior

​Common UBL Unit Codes

​Example Invoice Creation

​Basic Invoice with UBL Units

​Advanced e-Factura Compliance

​UBL Field Reference

​UBL Validation Rules

​UBL Resources and References

Official UBL Unit Codes

Combined Nomenclature (CN)

Common Procurement Vocabulary

ANAF e-Factura Docs

​Sending Invoices to SPV

​Basic SPV Submission

​Environment Override

​Successful Response

​Tracking Submission Status

​Using Expand Parameter

​Response with e-Factura Status

​Voiding e-Factura Invoices

​Standard Void Process

​Void Response

​Error Handling

​Common e-Factura Errors

OAuth Not Configured

Already Sent to SPV

Invalid Document Type

Draft Invoice

​Error Response Example

​Retry Logic for Failures

​Best Practices

​1. Environment Management

​2. Error Handling

​3. Batch Processing

​4. Status Monitoring

​Integration Checklist

​Support and Resources

​Compliance Notes

Overview

Prerequisites

Setup Process

1. Check e-Factura Status

2. e-Factura Settings Response

3. Manual OAuth Setup

Creating e-Factura Compatible Invoices

Invoice Requirements

UBL Unit Codes for e-Factura

Default Behavior

Common UBL Unit Codes

Example Invoice Creation

Basic Invoice with UBL Units

Advanced e-Factura Compliance

UBL Field Reference

UBL Validation Rules

UBL Resources and References

Sending Invoices to SPV

Basic SPV Submission

Environment Override

Successful Response

Tracking Submission Status

Using Expand Parameter

Response with e-Factura Status

Voiding e-Factura Invoices

Standard Void Process

Void Response

Error Handling

Common e-Factura Errors

Error Response Example

Retry Logic for Failures

Best Practices

1. Environment Management

2. Error Handling

3. Batch Processing

4. Status Monitoring

Integration Checklist

Support and Resources

Compliance Notes