The event registration process does not consider multiple submissions as duplicates because the platform allows a single contact to have multiple registrations for the same event. This design supports scenarios where attendees may register for different sessions or ticket types under the same event.To address your concern about preventing duplicate registrations for the same contact within the same event, the feature that should be implemented is a duplicate check at the Event Registration level. This enhancement would:Validate whether an existing registration already exists for the same contact and event combination.Block or prompt the user before creating a new registration for the same event.Provide flexibility to configure exceptions (e.g., allow multiple registrations for multi-session events if required).This functionality is not currently available out-of-the-box, as matching rules apply only to Contacts and not to Event Registrations. Implementing this feature would require either:A custom plugin for synchronous validation during registration, orA Power Automate flow with logic to check existing registrations before creating a new one.