Without deduplication, you’ll see inflated event counts?
How do you implement deduplication when using both Pixel and Conversions API for the same event? Why is this necessary?
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Assign a unique ‘event_id’ to each conversion. Pass the same event_id in both the browser-side Pixel and the server-side CAPI call. Meta uses this ID to deduplicate the event and avoid double-counting.
Without deduplication, you’ll see inflated event counts and misleading performance data. The two events should occur within a close timestamp window (ideally under 2 minutes). Use UUIDs for reliability.