---
title: Set up an alert for when a specific tag stops reporting
description: >-
  Create monitors that alert when specific tags disappear from your systems
  using impossible thresholds and missing data notifications.
breadcrumbs: >-
  Docs > Monitors > Monitor Guides > Set up an alert for when a specific tag
  stops reporting
---

# Set up an alert for when a specific tag stops reporting

In some cases, you would like to know when one of your tags disappears from some of your systems. It is possible to set up a [monitor](https://docs.datadoghq.com/monitors.md) for such an alert scheme within Datadog:

1. Set up a classic [metric monitor](https://docs.datadoghq.com/monitors/types/metric.md), and specify the metric and tag that you want to be alerted on when it is missing.
1. Select an alert condition that could never be triggered. For example, `a < -1` for a positive metric such as `system.cpu.user`.
1. Activate the *Notify if data is missing* option, as you can see on this example:

{% image
   source="https://docs.dd-static.net/images/monitors/guide/tag_stop_reporting.c0f304a6e5e3541cdb3bba4fbcf730f5.png?auto=format&fit=max&w=850 1x, https://docs.dd-static.net/images/monitors/guide/tag_stop_reporting.c0f304a6e5e3541cdb3bba4fbcf730f5.png?auto=format&fit=max&w=850&dpr=2 2x"
   alt="Tag stop reporting" /%}

Your alert triggers if the tag stops reporting.

## Further reading{% #further-reading %}

- [Learn how to create a monitor](https://docs.datadoghq.com/monitors.md)
- [Configure your monitor notifications](https://docs.datadoghq.com/monitors/notify.md)