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

# Limitations

> Webhook ordering guarantees, delivery constraints, and best practices

## Key limitations

<Warning>
  **Ordering is not guaranteed** between different topics for the same resource. For example, an `ORDER_UPDATED` webhook might be delivered before an `ORDER_CREATED` webhook. Your system should handle such cases.
</Warning>

* **At-least-once delivery**: Webhook events should be delivered at least once. This means your endpoint might receive the same event more than once. You can detect duplicate events by comparing the `id` value of received events.

* **Delivery not guaranteed**: Webhook delivery is not always guaranteed. If you require your data to be always consistent, you should implement reconciliation jobs to fetch data from Fourthwall periodically.