> 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-it/regole-modifica-in-blocco-e-arricchisci/come-usar-le-condizioni-si-nelle-regole/condizione-della-regla-gtin-o-ean-non-valido.md).

# Condizione della Regla: GTIN o EAN non valido

### Casi d'uso

* Individua ed escludi gli articoli con GTIN o EAN non validi (per alcuni canali, come Amazon, i GTIN o gli EAN sono obbligatori)

### esiste

Usa il **esiste** azione per verificare che i valori GTIN o EAN siano validi. Il formato GTIN corretto è di otto, dodici, tredici o quattordici cifre.

### non è valido

Usa il **non è valido** azione per verificare se il formato GTIN o EAN è corretto. Questa azione [calcola una cifra di controllo](https://www.gs1.org/services/check-digit-calculator) (che assicura che il codice a barre sia composto correttamente).

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

{% hint style="info" %}
In **Configura > Modifica mappatura**, assicurati che il campo sia mappato correttamente e sia del tipo giusto, poiché queste azioni possono essere usate solo per i campi GTIN ed EAN.
{% endhint %}

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


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