---
title: "Missing Result on Rules"
slug: "missing-evaluation-on-rules"
description: "Learn how Rules handle missing input data using null values and the optional Missing Result outcome in Flows."
tags: ["Rules"]
updated: 2026-07-13T17:00:20Z
published: 2026-07-13T17:00:20Z
canonical: "documentation.decisions.com/missing-evaluation-on-rules"
---

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

# Missing Result on Rules

## Overview

By default, Missing input data will be treated as a null value, causing **Rules** to evaluate as **True** or **False** based on their conditions. Rules can be configured to enable a Missing Result outcome, creating a new outcome path to handle missing input data if used in a **Flow**.

---

## Enabling Missing Result

The following example will demonstrate a Rule with **Show Missing Result** enabled.

1. [Create a Rule](/version-10/docs/create-rules) and define a few inputs and conditions.
2. In the Properties Panel, navigate to Output and check **Show Missing Result**. A new outcome will appear, labeled as **Missing**. ![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/image-1781200770726.png)
3. Debug the Rule. Notice that if input values for the condition are missing, the Rule will evaluate it as Missing.![](https://cdn.document360.io/6ef8bcc1-6489-4486-9ad1-83acff7e5df0/Images/Documentation/image-1781200784689.png)