> ## Documentation Index
> Fetch the complete documentation index at: https://docs-nce.global-e.com/llms.txt
> Use this file to discover all available pages before exploring further.

# EU Product Identifiers

Part of the [EU Customs Reform - Product Identifiers (PID)](/eu-product-identifiers-pid).

On BigCommerce, you store the values in your catalog using the native variant GTIN field and/or product metafields. The Global-e integration reads them at checkout and sends them to Global-e. Your SKU is already sent separately, so there is no new SKU field to add. Do not use the US MID fields (`MIDCode`, `ManufName` and similar) for EU PID.

For what each identifier is, see [The three identifiers](/eu-product-identifiers-pid#the-three-identifiers) on the overview page.

## What you need to do

1. **`standardcode`:** for each variant that can appear in the cart, populate the **GTIN** field in BigCommerce (variant **Barcodes & Identifiers**).

   <Frame>
     <img src="https://mintcdn.com/globale-nce/Mg6bKh5YkL7d8X8_/images/eu-product-identifiers/bigcommerce-gtin.png?fit=max&auto=format&n=Mg6bKh5YkL7d8X8_&q=85&s=7db0cb38c8df9f9d352f28bb6b429c7c" width="2592" height="1074" data-path="images/eu-product-identifiers/bigcommerce-gtin.png" />
   </Frame>

   If you do not use GTIN, create a metafield named exactly `standardcode` on the variant. A product-level metafield is used only as a fallback when the variant has no GTIN or variant metafield.

   **Product Metafield**

   <Frame>
     <img src="https://mintcdn.com/globale-nce/Mg6bKh5YkL7d8X8_/images/eu-product-identifiers/bigcommerce-product-metafield.png?fit=max&auto=format&n=Mg6bKh5YkL7d8X8_&q=85&s=b40a0e2231518838796b6c9cb56fcb5a" width="2660" height="992" data-path="images/eu-product-identifiers/bigcommerce-product-metafield.png" />
   </Frame>

   **Variant Metafield**

   <Frame>
     <img src="https://mintcdn.com/globale-nce/Mg6bKh5YkL7d8X8_/images/eu-product-identifiers/bigcommerce-variant-metafield.png?fit=max&auto=format&n=Mg6bKh5YkL7d8X8_&q=85&s=5437529a18c2e64b55cb0244d9fa6fbb" width="2646" height="1076" data-path="images/eu-product-identifiers/bigcommerce-variant-metafield.png" />
   </Frame>

2. **`mididentifier`:** when available, create a metafield named exactly `mididentifier` on the variant. A product-level metafield is used as a fallback only.

3. **Confirm with your Global-e CSM** that EU PID is enabled for your account and that you are on a BigCommerce integration release that supports EU PID.

4. **Place a test order** and confirm both keys appear when values exist and are omitted when blank.

| Sent as | What it holds | When to leave it out |
| - | - | - |
| **`standardcode`** | The barcode for that variant (GTIN, EAN or UPC) | When the item has no barcode. Global-e declares the "no barcode" code automatically. |
| **`mididentifier`** | The manufacturer's product code for that variant | Never. This is required on every line. |

## How Global-e reads the values

For each cart line, the integration uses the first non-empty value in this order:

* **`standardcode`** (first non-empty wins): variant GTIN, then variant metafield `standardcode`, then product metafield `standardcode`, otherwise omit.
* **`mididentifier`** (first non-empty wins): variant metafield `mididentifier`, then product metafield `mididentifier`, otherwise omit.

No per-merchant field mapping is required on the Global-e side. Use the variant GTIN and/or metafields with these exact key names.

## Key points

**Exact lowercase.** The SendCart keys, and any metafields you use, must be exactly `standardcode` and `mididentifier`.

**GTIN is the default source for `standardcode`** when populated on the variant. You do not need a `standardcode` metafield when GTIN is set.

**One pair of values per variant.** A value on the parent product alone is not used when the variant has its own GTIN or variant metafield.

**Omit, don't fake.** Leave the key out when you have no value. Never send an empty string, NA, 0 or -.

**When values are read:** at checkout, when the customer proceeds to Global-e. Updated catalog values apply on that variant's next checkout.

**Keep separate from US MID** and from other product fields such as `MerchantHSCode`.

<h2 id="quick-check-before-go-live">
  Quick check before go-live
</h2>

| Check | Done |
| - | - |
| `standardcode` appears when the variant has GTIN or a `standardcode` metafield value | ☐ |
| `mididentifier` appears when the variant (or product fallback) has a `mididentifier` metafield value | ☐ |
| Keys are omitted (not empty) when a variant has no value | ☐ |
| Each variant in the cart sends its own pair | ☐ |
| EU PID keys are separate from US MID keys and `MerchantHSCode` | ☐ |