---
title: "MandatoryField – API-Referenz · Quittio"
description: "A value that must appear in the PDF (checked by the mandatory field guard)."
canonical_url: "https://quittio.dev/docs/api/Quittio/Core/Countries/MandatoryField"
locale: de
meta:
  "og:description": "A value that must appear in the PDF (checked by the mandatory field guard)."
  "og:image": "https://quittio.dev/og/quittio-de.jpg"
  "og:image:alt": "Quittio: E-Rechnungen für PHP und Laravel. Rechtssicher, validiert, archiviert, mit geprüfter Beispielrechnung."
  "og:image:height": "630"
  "og:image:type": image/jpeg
  "og:image:width": "1200"
  "og:title": "MandatoryField – API-Referenz · Quittio"
  "twitter:image": "https://quittio.dev/og/quittio-de.jpg"
  "twitter:image:alt": "Quittio: E-Rechnungen für PHP und Laravel. Rechtssicher, validiert, archiviert, mit geprüfter Beispielrechnung."
---

> 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) \\ [Countries](https://quittio.dev/docs/api/Quittio/Core/Countries)

# MandatoryField

final readonly class in quittio/core

`Quittio\Core\Countries\MandatoryField` · [Source](https://github.com/Quittio/quittio/blob/v0.7.1/packages/core/src/Countries/MandatoryField.php#L12)

A value that must appear in the PDF (checked by the mandatory field guard).

$accessKey is the view model path whose access is recorded, e.g. "seller.vatId".

## Properties \#

| Property | Type | Description |
| --- | --- | --- |
| `$accessKey` readonly | `string` | |
| `$description` readonly | `string` | |
| `$legalBasis` readonly | `?string` | |

## Methods \#

| Method | Description |
| --- | --- |
| `->__construct()` | |

### `__construct()`#

```
public function __construct(
    string $accessKey,
    string $description,
    ?string $legalBasis = null,
)
```

| Parameter | Type | Description |
| --- | --- | --- |
| `$accessKey` | `string` | |
| `$description` | `string` | |
| `$legalBasis` | `?string` = `null` | |

```json
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```