Is it possible to make requestor not get FYI notification?

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As below

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We have a setup so that when employee submits a leave, they get a notification and the line manager get a notification.

When a line manager submits a leave for employee, the employee gets a notification as well as the line manager(requestor/requester).

When HR submits a leave for employee, the employee, line manager and HR(requestor/requester) gets a notification.

How to make it such that the requestor(person submitting the leave) does not get the notification.

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