How do users receive this "PO Requires Receipt" notification?

Summary:

I have followed the opt-in instructions for the Redwood Template for Confirm Receipt Notifications from the link below, but cannot figure out how to actually get the notification. What triggers it? A requisition, PO, or receipt? Is it only found in the worklist, or would users receive an email too?

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Oracle Fusion Cloud Inventory Management 25B What's New

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