You can check, employee by employee, which notifications were actually sent and when.
👉 Step 1: Go to Team, then open the record of the employee concerned.
👉 Step 2: Open the Programme tab.
👉 Step 3: For each course received, you can see the associated notifications and the date they were sent.
If the reminder shows as sent but the employee insists they received nothing, the problem is on the receiving channel rather than on Riot's side. The most common causes are detailed in An employee says they didn't receive the course reminder.
👍 Good to know: if your workspace runs on Cyber Missions, follow-ups follow different rules and are capped. The details are described in Set Up and Modify the Notification Channel.