When there isn't enough inventory at one location to fulfill the total quantity of ordered items, Shopify automatically splits the item across multiple fulfillment locations at checkout. This process prevents inventory levels from falling below zero at any location when an order requires fulfillment from multiple locations.
This guide describes how to support API integrations to accommodate this behavior.
## How might my app be impacted?
API integrations that read [`FulfillmentOrders`](/docs/api/admin-graphql/latest/objects/FulfillmentOrder) might be affected by the behavior of split fulfillment orders. If an app is designed to handle orders as if each inventory item can only contain a single fulfillment order, then it might not account for the full quantity needed for fulfillment.
## How split orders occur
Split allocation in an order can occur under the following circumstances:
- The store has multiple fulfillment locations for inventory items.
- **Fulfillable inventory** is set to **sell only within configured zones**, in the **Shipping and delivery** settings page in the Shopify admin.
> Note:
> If this option isn't available in the Shopify admin, then it means it's enabled by default.
- There are products or product variants that are configured to **continue selling when out of stock**.
- A checkout is completed containing one of the above products or product variants with a quantity that is greater than can be fulfilled from a single location, but less than or equal to what is available in all locations.
- Inventory from multiple locations will be used to fulfil the required quantity, resulting in an order with multiple fulfillment orders for the product variant.
## Which API endpoints are impacted?
If your app executes any of the following GraphQL Admin API queries and mutations that produce [`FulfillmentOrder`](/docs/api/admin-graphql/latest/objects/FulfillmentOrder) objects, then your app might be affected by split orders behavior:
- [`fulfillmentOrders`](/docs/api/admin-graphql/latest/queries/fulfillmentOrders)
- [`assignedFulfillmentOrders`](/docs/api/admin-graphql/latest/queries/assignedFulfillmentOrders)
- [`fulfillmentOrderSubmitFulfillmentRequest`](/docs/api/admin-graphql/latest/mutations/fulfillmentOrderSubmitFulfillmentRequest)
- [`fulfillmentOrderAcceptFulfillmentRequest`](/docs/api/admin-graphql/latest/mutations/fulfillmentOrderAcceptFulfillmentRequest)
- [`fulfillmentOrderRejectFulfillmentRequest`](/docs/api/admin-graphql/latest/mutations/fulfillmentOrderRejectFulfillmentRequest)
- [`fulfillmentOrderSubmitCancellationRequest`](/docs/api/admin-graphql/latest/mutations/fulfillmentOrderSubmitCancellationRequest)
- [`fulfillmentOrderAcceptCancellationRequest`](/docs/api/admin-graphql/latest/mutations/fulfillmentOrderAcceptCancellationRequest)
- [`fulfillmentOrderRejectCancellationRequest`](/docs/api/admin-graphql/latest/mutations/fulfillmentOrderRejectCancellationRequest)
- [`fulfillmentOrderHold`](/docs/api/admin-graphql/latest/mutations/fulfillmentOrderHold)
- [`fulfillmentOrderReleaseHold`](/docs/api/admin-graphql/latest/mutations/fulfillmentOrderReleaseHold)
- [`fulfillmentOrderMove`](/docs/api/admin-graphql/latest/mutations/fulfillmentOrderMove)
- [`fulfillmentOrderReschedule`](/docs/api/admin-graphql/latest/mutations/fulfillmentOrderReschedule)
Similarly, if your app calls any of the following REST Admin API endpoints that produce `FulfillmentOrder` data, then your app might be affected by split orders behavior:
- [`/assigned_fulfillment_orders`](/docs/api/admin-rest/latest/resources/assignedfulfillmentorder)
- [`/fulfillment_orders/:fulfillment_order_id`](/docs/api/admin-rest/latest/resources/fulfillmentorder#get-fulfillment-orders-fulfillment-order-id)
- [`/orders/:order_id/fulfillment_orders`](/docs/api/admin-rest/latest/resources/fulfillmentorder#get-orders-order-id-fulfillment-orders)
- [`/fulfillmentrequest`](/docs/api/admin-rest/latest/resources/fulfillmentrequest)
## Testing your API integration
To validate your app's compatibility with split orders, you need to ensure it can handle API responses where a line item is divided across multiple fulfillment orders within a single order. The specifics will vary depending on the API endpoints you are using. The following sections provide examples for both a GraphQL Admin API request and a REST Admin API request.
### GraphQL Admin API: Split fulfillment orders result
The following example shows a request for the [`fulfillmentOrders`](/docs/api/admin-graphql/latest/queries/fulfillmentOrders) query, which returns [`FulFillmentOrder`](/docs/api/admin-graphql/latest/objects/FulfillmentOrder) objects for a given [`order`](/docs/api/admin-graphql/latest/queries/order).
The example shows two possible responses:
- **Response 1**: All inventory has been allocated to a single location, so there is only a single fulfillment order.
- **Response 2**: Inventory has been split across two locations. There are two fulfillment orders for the same inventory item. Both the `InventoryItemId` and the `variant.id` are identical. The `lineItem.id` differs, as does the `assignedLocation` information. You need to ensure that your app handles the second response correctly.
<p>
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<script data-option="title" data-value="POST https://{shop}.myshopify.com/admin/api/{api_version}/graphql.json"></script>
<p>
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<script data-option="title" data-value="GraphQL query"></script>
<script type="text/plain" data-language="graphql">
RAW_MD_CONTENTquery {
order(id: "gid://shopify/Order/13489390190614") {
id
fulfillmentOrders(first: 3) {
edges {
node {
lineItems(first: 10) {
edges {
node {
id
inventoryItemId
variant {
id
}
remainingQuantity
}
}
}
assignedLocation {
location {
id
}
name
city
}
}
}
}
}
}
END_RAW_MD_CONTENT</script>
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</div>
<script data-option="title" data-value="Response 1: Without splitting, so inventory is allocated to a single location"></script>
<script data-option="nocopy" data-value="true"></script>
<script type="text/plain" data-language="json">
RAW_MD_CONTENT{
"data": {
"order": {
"id": "gid://shopify/Order/13489390190614",
"fulfillmentOrders": {
"edges": [
{
"node": {
"lineItems": {
"edges": [
{
"node": {
"id": "gid://shopify/FulfillmentOrderLineItem/39204000006166",
"inventoryItemId": "gid://shopify/InventoryItem/52759046619158",
"variant": {
"id": "gid://shopify/ProductVariant/50717824155670"
},
"remainingQuantity": 2
}
}
]
},
"assignedLocation": {
"location": {
"id": "gid://shopify/Location/102336593942"
},
"name": "Store Location",
"city": "Brighton"
}
}
}
]
}
}
},
"extensions": {
"cost": {
"requestedQueryCost": 29,
"actualQueryCost": 10
}
}
}
END_RAW_MD_CONTENT</script>
</div>
</p>
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</div>
</div>
</div>
<script data-option="title" data-value="Response 2: With splitting, so inventory has been allocated across two locations"></script>
<script data-option="nocopy" data-value="true"></script>
<script type="text/plain" data-language="json">
RAW_MD_CONTENT{
"data": {
"order": {
"id": "gid://shopify/Order/13489390190614",
"fulfillmentOrders": {
"edges": [
{
"node": {
"lineItems": {
"edges": [
{
"node": {
"id": "gid://shopify/FulfillmentOrderLineItem/39204000006166",
"inventoryItemId": "gid://shopify/InventoryItem/52759046619158",
"variant": {
"id": "gid://shopify/ProductVariant/50717824155670"
},
"remainingQuantity": 1
}
}
]
},
"assignedLocation": {
"location": {
"id": "gid://shopify/Location/102336593942"
},
"name": "Store Location",
"city": "Brighton"
}
}
},
{
"node": {
"lineItems": {
"edges": [
{
"node": {
"id": "gid://shopify/FulfillmentOrderLineItem/39204000038934",
"inventoryItemId": "gid://shopify/InventoryItem/52759046619158",
"variant": {
"id": "gid://shopify/ProductVariant/50717824155670"
},
"remainingQuantity": 1
}
}
]
},
"assignedLocation": {
"location": {
"id": "gid://shopify/Location/102435913750"
},
"name": "Warehouse location",
"city": "Edinburgh"
}
}
}
]
}
}
},
"extensions": {
"cost": {
"requestedQueryCost": 29,
"actualQueryCost": 10
}
}
}
END_RAW_MD_CONTENT</script>
</div>
</p>
</div>
</p>
### REST Admin API: Split fulfillment orders result
The following example shows a request to the [`/orders/:order_id/fulfillment_orders`](/docs/api/admin-rest/latest/resources/fulfillmentorder#get-orders-order-id-fulfillment-orders) REST Admin API endpoint, which returns fulfillment order data for a given order.
The example shows two possible responses:
- **Response 1**: All inventory has been allocated to a single location, so there is only a single fulfillment order.
- **Response 2**: Inventory has been split across two locations. There are two fulfillment orders for the same inventory item. Both the `inventory_item_id`, the `variant_id`, and the `line_item_id` (the
order's line item ID) are identical. The `line_item.id` differs, as does the `assigned_location` information. You need to ensure that your app handles the second response correctly.
<p>
<div class="react-stacked-code-block ThemeMode-dim" data-preset="stacked">
<script data-option="title" data-value="GET https://{shop}.myshopify.com/admin/api/{api_version}/orders/13489390190614/fulfillment_orders.json"></script>
<p>
<div class="react-code-block" data-preset="terminal">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar "></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
</div>
</div>
<script data-option="title" data-value="cURL request"></script>
<script type="text/plain" data-language="shell">
RAW_MD_CONTENTcurl -X GET "https://{shop}.myshopify.com/admin/api/{api_version}/orders/13489390190614/fulfillment_orders.json" -H "X-Shopify-Access-Token: {access_token}"
END_RAW_MD_CONTENT</script>
</div>
</p>
<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
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</div>
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<div class="react-code-block-preload-codeline-number"></div>
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</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
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</div>
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<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
</div>
</div>
<script data-option="title" data-value="Response 1: Without splitting, so everything is allocated to a single location"></script>
<script data-option="nocopy" data-value="true"></script>
<script type="text/plain" data-language="json">
RAW_MD_CONTENT{
"fulfillment_orders": [
{
"id": 14820250812438,
"order_id": 13489390190614,
"assigned_location_id": 102336593942,
"line_items": [
{
"id": 39204000006166,
"fulfillment_order_id": 14820250812438,
"quantity": 2,
"line_item_id": 39179185127446,
"inventory_item_id": 52759046619158,
"fulfillable_quantity": 2,
"variant_id": 50717824155670,
...
}
],
"assigned_location": {
"city": "Brighton",
"location_id": 102336593942,
...
},
...
}
]
}
END_RAW_MD_CONTENT</script>
</div>
</p>
<p>
<div class="react-code-block" data-preset="basic">
<div class="react-code-block-preload ThemeMode-dim">
<div class="react-code-block-preload-bar basic-codeblock"></div>
<div class="react-code-block-preload-placeholder-container">
<div class="react-code-block-preload-code-container">
<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
<div class="react-code-block-preload-code-container">
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<div class="react-code-block-preload-codeline"></div>
</div>
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<div class="react-code-block-preload-codeline"></div>
</div>
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<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
</div>
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<div class="react-code-block-preload-codeline-number"></div>
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<div class="react-code-block-preload-codeline-number"></div>
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</div>
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<div class="react-code-block-preload-codeline-number"></div>
<div class="react-code-block-preload-codeline"></div>
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<script data-option="title" data-value="Response 2: With splitting, so the inventory has been allocated across two locations"></script>
<script data-option="nocopy" data-value="true"></script>
<script type="text/plain" data-language="json">
RAW_MD_CONTENT{
"fulfillment_orders": [
{
"id": 14820250812438,
"order_id": 13489390190614,
"assigned_location_id": 102336593942,
"line_items": [
{
"id": 39204000006166,
"fulfillment_order_id": 14820250812438,
"quantity": 1,
"line_item_id": 39179185127446,
"inventory_item_id": 52759046619158,
"fulfillable_quantity": 1,
"variant_id": 50717824155670,
...
}
],
"assigned_location": {
"city": "Brighton",
"location_id": 102336593942,
...
},
...
},
{
"id": 14820250845206,
"order_id": 13489390190614,
"assigned_location_id": 102435913750,
"line_items": [
{
"id": 39204000038934,
"fulfillment_order_id": 14820250845206,
"quantity": 1,
"line_item_id": 39179185127446,
"inventory_item_id": 52759046619158,
"fulfillable_quantity": 1,
"variant_id": 50717824155670,
...
}
],
"assigned_location": {
"city": "Edinburgh",
"location_id": 102435913750,
...
},
...
}
]
}
END_RAW_MD_CONTENT</script>
</div>
</p>
</div>
</p>
## Next steps
- Review the GraphQL Admin API's [`FulfillmentOrder`](/docs/api/admin-graphql/latest/objects/FulfillmentOrder) object or the REST Admin API's [`FulfillmentOrder`](/docs/api/admin-rest/2025-01/resources/fulfillmentorder) resource.
- Learn about [order management and fulfillment](/docs/apps/build/orders-fulfillment/order-management-apps/build-fulfillment-solutions) solutions.
- Follow the tutorial to [build a fulfillment service app](docs/apps/build/orders-fulfillment/fulfillment-service-apps/build-for-fulfillment-services).