Manage Notifications
Notifications by Default
If the Sync checklists to Custom Fields global setting is enabled, then Jira will track all changes to the checklist in the work item History tab and Notifications section:


Disable Notifications in the Jira Notifications Panel
There is currently no way to disable notifications in the Jira notifications panel. Please vote for these Atlassian tickets to allow the option to bypass notification when an work item is updated:
Disable Notifications in the Activity Stream Dashboard Gadget
In the Activity Stream, filter out entries added by a user
addon_com.okapya.jira.checklist (Enterprise version)
addon_com.gebsun.plugins.jira.issuechecklist (Pro version)
addon_com.herocoders.plugins.jira.issuechecklist-free (Free version)
Disable Email Notifications
Jira Email Notifications
Users might receive email notifications of work item updates in accordance with the project’s notification scheme and their personal settings. If you want to leave integration with custom fields enabled, but don’t want Jira to send a notification whenever a checklist item is checked/changed, please either:
Modify the notification scheme for a project in Jira
Filter out emails using the app name
Checklists Email Notifications
If the Send email notifications for user mentions global setting is enabled, then Checklists for Jira will send an email to users who are mentioned in checklists. Currently, there is no way for individual users to unsubscribe from these emails.