Can I add a condition for jira workflow transition in cloud instance that is based on the custom property key value

[tarishi upadhyay]

I need to Check my custom property value before marking the task done. 

If its true then only user should go to the next stage. Please let me know if it can be done.

[Tom Proctor]

You can probably use a Validator on the workflow for this. Look here;

https://confluence.atlassian.com/adminjiracloud/advanced-workflow-configuration-776636620.html#Advancedworkflowconfiguration-validators