Ad Tracking Debugging

How to Fix Meta Pixel & CAPI Purchase Event Deduplication Errors on Shopify

By Muhammad Bilal Shakeel (Goofy Developer)2026-08-15T05:00:00Z7 min read

When both browser Pixel and Server CAPI send purchase events without matching event_id strings, Facebook Ads Manager double-counts sales or flags "Purchase Event Deduplication Issues" in Event Manager.

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