Steps
Click the gear icon in the top-left corner to open pipeline settings.
Select the pipeline you want to update from the dropdown (e.g., Commercial Leads Settings).
In the left-hand menu, click General.
Scroll down to the Notifications section.
Toggle Notify on duplicate leads to OFF.
That's it — the change saves automatically.
What This Does
When ON: The assignee receives a notification email any time a duplicate lead is detected in this pipeline.
When OFF: The assignee will not receive a notification email for duplicate leads detected in this pipeline.
Notes
This setting is per pipeline, so if you manage multiple pipelines, you'll need to repeat these steps for each one where you want to disable the notification.
This only affects the duplicate lead notification email — it doesn't change any other communication or lead routing settings on the pipeline.