---
title: "InvoiceTitle – API-Referenz · Quittio"
description: "Label key of the document title for a type code (BT-3)."
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---

> Index of every page on this site: [llms.txt](https://quittio.dev/llms.txt)

[API reference](https://quittio.dev/docs/api) / [Quittio](https://quittio.dev/docs/api/Quittio) \\ [Core](https://quittio.dev/docs/api/Quittio/Core) \\ [View](https://quittio.dev/docs/api/Quittio/Core/View)

# InvoiceTitle

final class in quittio/core

`Quittio\Core\View\InvoiceTitle` · [Source](https://github.com/Quittio/quittio/blob/v0.7.1/packages/core/src/View/InvoiceTitle.php#L18)

Label key of the document title for a type code (BT-3).

Codes without an own title use the title of their family: self-billed documents are a "Gutschrift" (section 14 (2) sentence 5 UStG), commercial credit notes share the title of code 381, which must not be "Gutschrift" (BMF letter of 25 October 2013).

## Constants \#

| Constant | Value | Description |
| --- | --- | --- |
| `CODES` | `['380', '381', '384', '389', '325', '326', '386', '875', '876', '877']` | Type codes with an own title label ("title\_{code}"). |

## Methods \#

| Method | Description |
| --- | --- |
| `::key()` | |
| `::keyFor()` | |
| `::keys()` | |
| `::policyTitle()` | Title of a self-billed document from the correction policy of the country pack (CorrectionPolicy title "self\_billed", e.g. "Gutschrift"), like the titles of cancellations and corrections; null for other documents or without such a title (then the label of the type code applies). A title of the presentation wins over both. |

### `key()`#

```
public static function key(InvoiceData $invoice): string
```

static

| Parameter | Type | Description |
| --- | --- | --- |
| `$invoice` | `[InvoiceData](https://quittio.dev/docs/api/Quittio/Core/Data/InvoiceData)` | |

<dl><dt>Returns</dt>
<dd><code>string</code></dd>
</dl>

### `keyFor()`#

```
public static function keyFor(string $typeCode): string
```

static

| Parameter | Type | Description |
| --- | --- | --- |
| `$typeCode` | `string` | |

<dl><dt>Returns</dt>
<dd><code>string</code></dd>
</dl>

### `keys()`#

```
public static function keys(): list<string>
```

static

<dl><dt>Returns</dt>
<dd><code>list&lt;string&gt;</code> – all title label keys</dd></dl>

### `policyTitle()`#

```
public static function policyTitle(
    InvoiceData $invoice,
    ?CountryPack $country,
    string $locale,
): ?string
```

static

Title of a self-billed document from the correction policy of the country pack (CorrectionPolicy title "self\_billed", e.g. "Gutschrift"), like the titles of cancellations and corrections; null for other documents or without such a title (then the label of the type code applies). A title of the presentation wins over both.

| Parameter | Type | Description |
| --- | --- | --- |
| `$invoice` | `[InvoiceData](https://quittio.dev/docs/api/Quittio/Core/Data/InvoiceData)` | |
| `$country` | `? [CountryPack](https://quittio.dev/docs/api/Quittio/Core/Countries/CountryPack)` | |
| `$locale` | `string` | |

<dl><dt>Returns</dt>
<dd><code>?string</code></dd>
</dl>

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```