---
title: "Validators"
canonical: "https://support.appfire.com/space/PSCONF/15305686/Validators"
format: markdown
---
> Macro (aura-html)

Validators are just like [conditions](https://appfire.atlassian.net/wiki/spaces/PSCONF/pages/15305903) in that they return a true or false value. If TRUE, the user is allowed to compete the transition. If FALSE, the user will not be allowed to complete the transition. However, unlike conditions, a message will be displayed telling the user why they were unable to complete the transition.

## Example 1 - Issue must have subtasks

> Macro (excerpt-include)



## Example 2 - Must be a comment in the transition screen

> Macro (excerpt-include)