> For the complete documentation index, see [llms.txt](https://helpcenter.channable.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://helpcenter.channable.com/manage-improve-product-data/manage-product-and-improve-data-de/regeln-massenbearbeitung-und-anreicherung/so-verwendest-du-bedingungen-wenn-in-regeln/regelbedingung-ungultige-gtin-oder-ean.md).

# Regelbedingung: Ungültige GTIN oder EAN

### Anwendungsfälle

* Erkenne und schließe Artikel mit ungültigen GTINs oder EANs aus (für einige Kanäle, z. B. Amazon, sind GTINs oder EANs verpflichtend)

### gültig ist

Verwende die **gültig ist** Aktion, um zu prüfen, dass GTIN- oder EAN-Werte gültig sind. Das korrekte GTIN-Format besteht aus acht, zwölf, dreizehn oder vierzehn Ziffern.

### ungültig ist

Verwende die **ungültig ist** Aktion, um zu prüfen, ob das GTIN- oder EAN-Format korrekt ist. Diese Aktion [berechnet eine Prüfziffer](https://www.gs1.org/services/check-digit-calculator) (die sicherstellt, dass der Barcode korrekt zusammengesetzt ist).

<figure><img src="https://content.gitbook.com/content/u8whzIfip72Kvn3M1bsc/blobs/OY6JJIFuVUi0s1i42Uu8/360014391599" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
In **Setup > Mapping bearbeiten**, stelle sicher, dass das Feld korrekt gemappt ist und den richtigen Typ hat, da diese Aktionen nur für GTIN- und EAN-Felder verwendet werden können.
{% endhint %}

<figure><img src="https://content.gitbook.com/content/u8whzIfip72Kvn3M1bsc/blobs/3mueuiG2h0GLzjfsBAgP/12336072381842" alt=""><figcaption></figcaption></figure>


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