---
title: InvoiceService
description: API reference for the sales invoice service
---

# InvoiceService

The `InvoiceService` service handles sales invoice certification.

## Methods

### sign()

Certifies a sales invoice.

```php
public function sign(?array $data = null): ResponseDTO
```

**Parameters:**

- `$data` (array|null): Invoice data (optional if data is defined via context)

**Returns:** `ResponseDTO`

### Example:

```php
use Neocode\FNE\Facades\FNE;
use Neocode\FNE\Enums\InvoiceType;
use Neocode\FNE\Enums\PaymentMethod;
use Neocode\FNE\Enums\InvoiceTemplate;
use Neocode\FNE\Enums\TaxType;

$result = FNE::invoice()->sign([
    'invoiceType' => InvoiceType::SALE->value,
    'paymentMethod' => PaymentMethod::MOBILE_MONEY->value,
    'template' => InvoiceTemplate::B2C->value,
    'isRne' => false,
    'clientCompanyName' => 'Client',
    'clientPhone' => '0123456789',
    'clientEmail' => 'client@example.com',
    'pointOfSale' => 'POS-001',
    'establishment' => 'EST-001',
    'items' => [
        [
            'description' => 'Product',
            'quantity' => 1,
            'amount' => 10000.0,
            'taxes' => [TaxType::TVA->value],
        ],
    ],
    'taxes' => TaxType::TVA->value,
]);
```

## See Also

- [Guide - Sales Invoices](/docs/guides/invoices)

> [!info]
> **Need help?** Check out the [complete documentation](https://fne-client.neocode.ci/) or [open an issue](https://github.com/neocodesupport/fne-client/issues) on GitHub.