Require a comment on transition
Use the Require a comment on transition validator to make sure a comment is added to the issue during the chosen transition. For example, you can use this validator to ensure a closing statement is added to an issue when it is transitioned to Done, or equivalent.
Tip: This validator must be applied to a transition with a screen. Comments do not need to be configured to a screen as all transition screens include the option to add a comment.
Use this validator
You can now test to see if this workflow validator works. Issues in your chosen project will throw an error if you try to transition the issue without a comment.