> For the complete documentation index, see [llms.txt](https://developer.esw.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.esw.com/shopify/shopify-native/integration-workflow/fulfilment-and-shipping.md).

# Fulfilment and Shipping

ESW drives fulfillment execution.

Use ESW shipping events to create Shopify fulfillments.

### 1. ESW `PackageEvent`

Listen for ESW `PackageEvent` messages.

Use them to capture:

* Tracking number(s)
* Carrier details
* Shipped line items and quantities
* A stable package/event identifier for deduplication

<table data-card-size="large" data-view="cards"><thead><tr><th align="center"></th><th align="center"></th><th data-hidden data-card-cover data-type="image">Cover image</th><th data-hidden data-card-cover-dark data-type="image">Cover image (dark)</th></tr></thead><tbody><tr><td align="center"><h2><i class="fa-truck-fast" style="color:$primary;">:truck-fast:</i></h2><h4>ESW event</h4></td><td align="center"><code>PackageEvent</code></td><td><a href="/files/l7pL6vchwKVIHlSWnsQZ">/files/l7pL6vchwKVIHlSWnsQZ</a></td><td><a href="/files/Zn9WWvNhKVBMLfohh8Wa">/files/Zn9WWvNhKVBMLfohh8Wa</a></td></tr></tbody></table>

{% hint style="info" %}
Treat ESW events as at-least-once delivery.

Deduplicate and make Shopify writes idempotent.
{% endhint %}

### 2. Shopify Admin API (GraphQL)

Create the Shopify fulfillment for the items shipped in the package.

#### Shopify reference <i class="fa-code" style="color:$primary;">:code:</i> [fulfillmentCreateV2](https://shopify.dev/docs/api/admin-graphql/latest/mutations/fulfillmentCreateV2)

Implementation notes:

* Create one Shopify fulfillment per ESW package when possible.
* Create partial fulfillments when the package ships a subset of items.
* Store the Shopify fulfillment id against the ESW package id.
* Update tracking info consistently for replays and retries.


---

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