> 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-nl/regels-bulksgewijs-bewerken-en-verrijken/voorwaarden-als-gebruiken-in-regels/regelvoorwaarde-ongeldige-gtin-of-ean.md).

# Regelvoorwaarde: Ongeldige GTIN of EAN

### Use cases

* Detecteer en sluit items uit met ongeldige GTINs of EANs (voor sommige kanalen, zoals Amazon, zijn GTINs of EANs verplicht)

### is geldig

Gebruik de **is geldig** actie om te controleren of GTIN- of EAN-waarden geldig zijn. Het juiste GTIN-formaat is acht, twaalf, dertien of veertien cijfers.

### is niet geldig

Gebruik de **is niet geldig** actie om te controleren of het GTIN- of EAN-formaat correct is. Deze actie [berekent een controlecijfer](https://www.gs1.org/services/check-digit-calculator) (wat ervoor zorgt dat de streepjescode correct is samengesteld).

<figure><img src="/files/f15833bf360834203e85bb336bc4b247a15be3be" alt=""><figcaption></figcaption></figure>

{% hint style="info" %}
In **Setup > Wijzig mapping**, zorg dat het veld correct is gemapt en het juiste type heeft, want deze acties kunnen alleen worden gebruikt voor GTIN- en EAN-velden.
{% endhint %}

<figure><img src="/files/c306cbeb09f01c565e910489233f3f4125d318e8" alt=""><figcaption></figcaption></figure>


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