# fbaOutbound_cancelFulfillmentOrder (https://sellersheetai.com/docs/mcp-api/tools/fbaOutbound_cancelFulfillmentOrder)

> Cancel an MCF fulfillment order.

Access: **DESTRUCTIVE** · toolset amazon_sp · family sp.fulfillmentOutbound_2020-07-01

IRREVERSIBLE — confirm with the human first. Amazon SP-API · cancelFulfillmentOrder · PUT /fba/outbound/2020-07-01/fulfillmentOrders/{sellerFulfillmentOrderId}/cancel Gate: approve — interactive: show the change (Amazon's preview first where one exists), wait for an explicit approve; autopilot: only when the seller's own words asked for this change; otherwise ask. Already-shipped orders cannot be cancelled.

## Call it

MCP tool call:

```json
{
  "name": "fbaOutbound_cancelFulfillmentOrder",
  "arguments": {
    "store": "myStore-US",
    "seller_fulfillment_order_id": "<seller_fulfillment_order_id>"
  }
}
```

Tool API (early access — contact us):

```bash
curl -X POST https://api.sellersheetai.com/api/v1/tools/fbaOutbound_cancelFulfillmentOrder \
  -H "Authorization: Bearer $SELLERSHEET_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"store":"myStore-US","seller_fulfillment_order_id":"<seller_fulfillment_order_id>"}'
```

## Arguments

| Name | Type | Required | Description |
|---|---|---|---|
| `store` | string | yes | the store ref `<store>-<CC>` (name-country, e.g. 'myStore-US') — one of get_user_context's store_refs, verbatim. |
| `seller_fulfillment_order_id` | string | yes | the order to cancel. |

## Result

- `data.sellerFulfillmentOrderId` — the order whose cancellation was requested — fbaOutbound_getFulfillmentOrder shows fulfillmentOrderStatus Cancelled once Amazon applies it.