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How to validate that Assignee is NOT a specific user

Asier Vadillo

Hi everyone,

I’m trying to set up a workflow transition validation in Jira Cloud using only native functionalities.

The Goal: I want to prevent a transition from happening if:

The Assignee field is empty (Unassigned).
The Assignee is a specific user (e.g., a "Team" bot or a specific individual).

Thanks beforehand!

Accepted answers

All comments

Gor Greyan

Hi @Asier Vadillo

Thanks for the question.

Am I right that you want to set a validator on the transition, where the screen is being displayed, or do you want to set a restriction, if the assignee is empty or not a Bot, the transition is not being displayed at all?

Laura Campbell

HI @Asier Vadillo , you can do this easily by adding a rule (I'm assuming Company managed project)

In the new workflow tool, click on Rule on the top

Screenshot 2026-03-27 at 16.15.28.png

To prevent that someone transitions the issue if the assignee is blank, you'll need to add a rule to Validate a field. You can easily select in the drop downs the value, and the field, and then a custom error message.

Add rule- validate a field for assignee.png

To prevent specific users from transitioning, you can also easily do it with the option to restrict the transition when a field is a specific value.

Prevent specific users from moving work item.png

Another way to do it would be to create a rule "Restrict who can move a work item"

Screenshot 2026-03-27 at 16.20.15.png

Asier Vadillo

Hi @Gor Greyan ,

I want a validator, to notify people that the assignee must not be the bot. If it is not possible I will use the approach @Laura Campbell defined in the comment above.

Thanks for the answer!

Gor Greyan

Hi @Asier Vadillo

Great, I saw it.

Thank you, too.

Asier Vadillo

Hi @Gor Greyan

I assume it is not possible to make a validator?

Thiago Wenceslau -Appfire-

Hi @Asier Vadillo

I’m Thiago, a support engineer at Appfire.

If you should consider using third-party apps, the JMWE(Jira Misc Workflow Extensions) can make such validation, here's an example:

Screenshot 2026-03-31 at 09.29.03.png

This workflow will restrict transition when the Assignee is not empty or the set accountId, where the accountId of the bot can be found easily through the nunjucks interface with "Lookup User".

!!issue.assignee && issue.assignee.accountId != "accountId:an-account-id"

Please contact our support if you have any other questions about this.

Best regards, Appfire support team.

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