Meta Consent Mode + CAPI: The Deduplication Pattern That Actually Works

If you've implemented the Meta Pixel alongside the Conversions API, you already know the two classic failure modes: duplicate events inflating conversion counts, and missing events when the browser blocks the Pixel. Meta Consent Mode introduces a third axis — consent state — that has to flow cleanly through both channels or the whole thing collapses. Here's the pattern that actually holds up in production. 1. Generate an event_id at the source Every tracked event needs a UUID that rides along on